21013220523290 has 64 divisors (see below), whose sum is σ = 40574424925440. Its totient is φ = 7810988590080.

The previous prime is 21013220523289. The next prime is 21013220523397. The reversal of 21013220523290 is 9232502231012.

It is a super-2 number, since 2×21013220523290² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47319467 + ... + 47761473.

It is an arithmetic number, because the mean of its divisors is an integer number (633975389460).

Almost surely, 2^{21013220523290} is an apocalyptic number.

21013220523290 is a deficient number, since it is larger than the sum of its proper divisors (19561204402150).

21013220523290 is a wasteful number, since it uses less digits than its factorization.

21013220523290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446807.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 21013220523290 in words is "twenty-one trillion, thirteen billion, two hundred twenty million, five hundred twenty-three thousand, two hundred ninety".