111121002120 has 32 divisors (see below), whose sum is σ = 333363006720. Its totient is φ = 29632267200.

The previous prime is 111121002107. The next prime is 111121002149. The reversal of 111121002120 is 21200121111.

It is a super-2 number, since 2×111121002120² (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 = 111121002096 and 111121002105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463004056 + ... + 463004295.

It is an arithmetic number, because the mean of its divisors is an integer number (10417593960).

Almost surely, 2^111121002120 is an apocalyptic number.

111121002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121002120 is an abundant number, since it is smaller than the sum of its proper divisors (222242004600).

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

111121002120 is a wasteful number, since it uses less digits than its factorization.

111121002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926008365 (or 926008361 counting only the distinct ones).

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

Adding to 111121002120 its reverse (21200121111), we get a palindrome (132321123231).

The spelling of 111121002120 in words is "one hundred eleven billion, one hundred twenty-one million, two thousand, one hundred twenty".