21120120111112 has 64 divisors (see below), whose sum is σ = 45785806035840. Its totient is φ = 9026581171200.

The previous prime is 21120120111107. The next prime is 21120120111113. The reversal of 21120120111112 is 21111102102112.

It is not an unprimeable number, because it can be changed into a prime (21120120111113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5304243 + ... + 8388994.

It is an arithmetic number, because the mean of its divisors is an integer number (715403219310).

Almost surely, 2^{21120120111112} is an apocalyptic number.

21120120111112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21120120111112 is an abundant number, since it is smaller than the sum of its proper divisors (24665685924728).

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

21120120111112 is a wasteful number, since it uses less digits than its factorization.

21120120111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13694302 (or 13694298 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21120120111112 its reverse (21111102102112), we get a palindrome (42231222213224).

The spelling of 21120120111112 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, one hundred eleven thousand, one hundred twelve".