21121222013310 has 64 divisors (see below), whose sum is σ = 50898360084480. Its totient is φ = 5609295048960.

The previous prime is 21121222013299. The next prime is 21121222013323. The reversal of 21121222013310 is 1331022212112.

21121222013310 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21121222013310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 19830426 + ... + 20868354.

It is an arithmetic number, because the mean of its divisors is an integer number (795286876320).

Almost surely, 2^{21121222013310} is an apocalyptic number.

21121222013310 is an abundant number, since it is smaller than the sum of its proper divisors (29777138071170).

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

21121222013310 is a wasteful number, since it uses less digits than its factorization.

21121222013310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040713.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21121222013310 its reverse (1331022212112), we get a palindrome (22452244225422).

The spelling of 21121222013310 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, thirteen thousand, three hundred ten".