21120656610212 has 24 divisors (see below), whose sum is σ = 37024359434496. Its totient is φ = 10542273567488.

The previous prime is 21120656610211. The next prime is 21120656610293. The reversal of 21120656610212 is 21201665602112.

It is not an unprimeable number, because it can be changed into a prime (21120656610211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15152933 + ... + 16487955.

It is an arithmetic number, because the mean of its divisors is an integer number (1542681643104).

Almost surely, 2^{21120656610212} is an apocalyptic number.

It is an amenable number.

21120656610212 is a deficient number, since it is larger than the sum of its proper divisors (15903702824284).

21120656610212 is a wasteful number, since it uses less digits than its factorization.

21120656610212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341787 (or 1341785 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 21120656610212 in words is "twenty-one trillion, one hundred twenty billion, six hundred fifty-six million, six hundred ten thousand, two hundred twelve".