21210112120112 has 20 divisors (see below), whose sum is σ = 41095139756856. Its totient is φ = 10604914763520.

The previous prime is 21210112120069. The next prime is 21210112120117. The reversal of 21210112120112 is 21102121101212.

It is a super-2 number, since 2×21210112120112² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21210112120117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7587314 + ... + 9999377.

Almost surely, 2^{21210112120112} is an apocalyptic number.

It is an amenable number.

21210112120112 is a deficient number, since it is larger than the sum of its proper divisors (19885027636744).

21210112120112 is a wasteful number, since it uses less digits than its factorization.

21210112120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17662076 (or 17662070 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21210112120112 its reverse (21102121101212), we get a palindrome (42312233221324).

The spelling of 21210112120112 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred twenty thousand, one hundred twelve".