21021321222310 has 24 divisors (see below), whose sum is σ = 39934687248576. Its totient is φ = 7965974356560.

The previous prime is 21021321222289. The next prime is 21021321222389. The reversal of 21021321222310 is 1322212312012.

It is a super-2 number, since 2×21021321222310² (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 11 ways as a sum of consecutive naturals, for example, 2911536726 + ... + 2911543945.

It is an arithmetic number, because the mean of its divisors is an integer number (1663945302024).

Almost surely, 2^{21021321222310} is an apocalyptic number.

21021321222310 is a deficient number, since it is larger than the sum of its proper divisors (18913366026266).

21021321222310 is a wasteful number, since it uses less digits than its factorization.

21021321222310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823080716 (or 5823080697 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21021321222310 its reverse (1322212312012), we get a palindrome (22343533534322).

The spelling of 21021321222310 in words is "twenty-one trillion, twenty-one billion, three hundred twenty-one million, two hundred twenty-two thousand, three hundred ten".