111021120120 has 32 divisors (see below), whose sum is σ = 333063360720. Its totient is φ = 29605632000.

The previous prime is 111021120113. The next prime is 111021120121. The reversal of 111021120120 is 21021120111.

It is a super-2 number, since 2×111021120120² (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 = 111021120096 and 111021120105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021120121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 462587881 + ... + 462588120.

Almost surely, 2^111021120120 is an apocalyptic number.

111021120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021120120 is an abundant number, since it is smaller than the sum of its proper divisors (222042240600).

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

111021120120 is a wasteful number, since it uses less digits than its factorization.

111021120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925176015 (or 925176011 counting only the distinct ones).

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

Adding to 111021120120 its reverse (21021120111), we get a palindrome (132042240231).

Subtracting from 111021120120 its reverse (21021120111), we obtain a palindrome (90000000009).

The spelling of 111021120120 in words is "one hundred eleven billion, twenty-one million, one hundred twenty thousand, one hundred twenty".