111012311020 has 36 divisors (see below), whose sum is σ = 252438061680. Its totient is φ = 40989159744.

The previous prime is 111012310979. The next prime is 111012311117. The reversal of 111012311020 is 20113210111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16418560 + ... + 16425319.

It is an arithmetic number, because the mean of its divisors is an integer number (7012168380).

Almost surely, 2^111012311020 is an apocalyptic number.

111012311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012311020 is an abundant number, since it is smaller than the sum of its proper divisors (141425750660).

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

111012311020 is a wasteful number, since it uses less digits than its factorization.

111012311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32843914 (or 32843899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111012311020 its reverse (20113210111), we get a palindrome (131125521131).

The spelling of 111012311020 in words is "one hundred eleven billion, twelve million, three hundred eleven thousand, twenty".