111331011020 has 96 divisors (see below), whose sum is σ = 252782208000. Its totient is φ = 41060628224.

The previous prime is 111331011019. The next prime is 111331011023. The reversal of 111331011020 is 20110133111.

It is a happy number.

It is a super-2 number, since 2×111331011020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111331010986 and 111331011004.

It is not an unprimeable number, because it can be changed into a prime (111331011023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8624531 + ... + 8637429.

It is an arithmetic number, because the mean of its divisors is an integer number (2633148000).

Almost surely, 2^111331011020 is an apocalyptic number.

111331011020 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 111331011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126391104000).

111331011020 is an abundant number, since it is smaller than the sum of its proper divisors (141451196980).

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

111331011020 is a wasteful number, since it uses less digits than its factorization.

111331011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607 (or 13605 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 111331011020 its reverse (20110133111), we get a palindrome (131441144131).

The spelling of 111331011020 in words is "one hundred eleven billion, three hundred thirty-one million, eleven thousand, twenty".