21031021323310 has 64 divisors (see below), whose sum is σ = 38196359974080. Its totient is φ = 8337033169920.

The previous prime is 21031021323269. The next prime is 21031021323353. The reversal of 21031021323310 is 1332312013012.

It is a super-2 number, since 2×21031021323310² (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, 2148868237 + ... + 2148878023.

It is an arithmetic number, because the mean of its divisors is an integer number (596818124595).

Almost surely, 2^{21031021323310} is an apocalyptic number.

21031021323310 is a deficient number, since it is larger than the sum of its proper divisors (17165338650770).

21031021323310 is a wasteful number, since it uses less digits than its factorization.

21031021323310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21031021323310 its reverse (1332312013012), we get a palindrome (22363333336322).

The spelling of 21031021323310 in words is "twenty-one trillion, thirty-one billion, twenty-one million, three hundred twenty-three thousand, three hundred ten".