111100211220 has 96 divisors (see below), whose sum is σ = 314713848960. Its totient is φ = 29280993280.

The previous prime is 111100211219. The next prime is 111100211263. The reversal of 111100211220 is 22112001111.

It is a super-2 number, since 2×111100211220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111100211196 and 111100211205.

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 31 ways as a sum of consecutive naturals, for example, 23926219 + ... + 23930861.

It is an arithmetic number, because the mean of its divisors is an integer number (3278269260).

Almost surely, 2^111100211220 is an apocalyptic number.

111100211220 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 111100211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157356924480).

111100211220 is an abundant number, since it is smaller than the sum of its proper divisors (203613637740).

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

111100211220 is a wasteful number, since it uses less digits than its factorization.

111100211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225 (or 9223 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111100211220 its reverse (22112001111), we get a palindrome (133212212331).

The spelling of 111100211220 in words is "one hundred eleven billion, one hundred million, two hundred eleven thousand, two hundred twenty".