21310320310 has 32 divisors (see below), whose sum is σ = 39791606400. Its totient is φ = 8210941440.

The previous prime is 21310320287. The next prime is 21310320349. The reversal of 21310320310 is 1302301312.

It is a super-2 number, since 2×21310320310² (a number of 21 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 15 ways as a sum of consecutive naturals, for example, 296575 + ... + 361354.

It is an arithmetic number, because the mean of its divisors is an integer number (1243487700).

Almost surely, 2^21310320310 is an apocalyptic number.

21310320310 is a deficient number, since it is larger than the sum of its proper divisors (18481286090).

21310320310 is a wasteful number, since it uses less digits than its factorization.

21310320310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658056.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21310320310 its reverse (1302301312), we get a palindrome (22612621622).

The spelling of 21310320310 in words is "twenty-one billion, three hundred ten million, three hundred twenty thousand, three hundred ten".