21310231312210 has 64 divisors (see below), whose sum is σ = 39709645390080. Its totient is φ = 8224244824320.

The previous prime is 21310231312189. The next prime is 21310231312259. The reversal of 21310231312210 is 1221313201312.

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, 4753562629 + ... + 4753567111.

It is an arithmetic number, because the mean of its divisors is an integer number (620463209220).

Almost surely, 2^{21310231312210} is an apocalyptic number.

21310231312210 is a deficient number, since it is larger than the sum of its proper divisors (18399414077870).

21310231312210 is a wasteful number, since it uses less digits than its factorization.

21310231312210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12643.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21310231312210 its reverse (1221313201312), we get a palindrome (22531544513522).

The spelling of 21310231312210 in words is "twenty-one trillion, three hundred ten billion, two hundred thirty-one million, three hundred twelve thousand, two hundred ten".