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111220232220 = 2233512711511409
BaseRepresentation
bin110011110010100111…
…1100001000000011100
3101122002010111012022000
41213211033201000130
53310234334412340
6123032135322300
711015066242536
oct1474517410034
9348063435260
10111220232220
1143193a15699
121967b520390
13a6462563c6
14555129c856
152d5e2ccd30
hex19e53e101c

111220232220 has 192 divisors, whose sum is σ = 349293772800. Its totient is φ = 29378764800.

The previous prime is 111220232173. The next prime is 111220232243. The reversal of 111220232220 is 22232022111.

It is a super-2 number, since 2×1112202322202 (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111220232193 and 111220232202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78934876 + ... + 78936284.

It is an arithmetic number, because the mean of its divisors is an integer number (1819238400).

Almost surely, 2111220232220 is an apocalyptic number.

111220232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111220232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174646886400).

111220232220 is an abundant number, since it is smaller than the sum of its proper divisors (238073540580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111220232220 is a wasteful number, since it uses less digits than its factorization.

111220232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 111220232220 its reverse (22232022111), we get a palindrome (133452254331).

The spelling of 111220232220 in words is "one hundred eleven billion, two hundred twenty million, two hundred thirty-two thousand, two hundred twenty".