21000000120112 has 20 divisors (see below), whose sum is σ = 43817307943360. Its totient is φ = 9692307747648.

The previous prime is 21000000120067. The next prime is 21000000120137. The reversal of 21000000120112 is 21102100000012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50480769312 + ... + 50480769727.

It is an arithmetic number, because the mean of its divisors is an integer number (2190865397168).

Almost surely, 2^{21000000120112} is an apocalyptic number.

It is an amenable number.

21000000120112 is an abundant number, since it is smaller than the sum of its proper divisors (22817307823248).

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

21000000120112 is a wasteful number, since it uses less digits than its factorization.

21000000120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100961539060 (or 100961539054 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000000120112 its reverse (21102100000012), we get a palindrome (42102100120124).

The spelling of 21000000120112 in words is "twenty-one trillion, one hundred twenty thousand, one hundred twelve".