21313151022 has 32 divisors (see below), whose sum is σ = 45143654400. Its totient is φ = 6685008768.

The previous prime is 21313150987. The next prime is 21313151077. The reversal of 21313151022 is 22015131312.

It is a self number, because there is not a number n which added to its sum of digits gives 21313151022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501729 + ... + 542547.

It is an arithmetic number, because the mean of its divisors is an integer number (1410739200).

Almost surely, 2^21313151022 is an apocalyptic number.

21313151022 is an abundant number, since it is smaller than the sum of its proper divisors (23830503378).

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

21313151022 is a wasteful number, since it uses less digits than its factorization.

21313151022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45960.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 21313151022 its reverse (22015131312), we get a palindrome (43328282334).

The spelling of 21313151022 in words is "twenty-one billion, three hundred thirteen million, one hundred fifty-one thousand, twenty-two".