111133213020 has 144 divisors (see below), whose sum is σ = 345006436320. Its totient is φ = 28947230208.

The previous prime is 111133212979. The next prime is 111133213033. The reversal of 111133213020 is 20312331111.

It is a super-2 number, since 2×111133213020² (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 = 111133212984 and 111133213002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1634014 + ... + 1700666.

It is an arithmetic number, because the mean of its divisors is an integer number (2395878030).

Almost surely, 2^111133213020 is an apocalyptic number.

111133213020 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 111133213020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172503218160).

111133213020 is an abundant number, since it is smaller than the sum of its proper divisors (233873223300).

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

111133213020 is a wasteful number, since it uses less digits than its factorization.

111133213020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66884 (or 66879 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 111133213020 its reverse (20312331111), we get a palindrome (131445544131).

The spelling of 111133213020 in words is "one hundred eleven billion, one hundred thirty-three million, two hundred thirteen thousand, twenty".