21313112310 has 64 divisors (see below), whose sum is σ = 64954252800. Its totient is φ = 4871568096.

The previous prime is 21313112267. The next prime is 21313112329. The reversal of 21313112310 is 1321131312.

21313112310 is a `hidden beast` number, since 213 + 131 + 12 + 310 = 666.

It is a super-2 number, since 2×21313112310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5636500 + ... + 5640279.

It is an arithmetic number, because the mean of its divisors is an integer number (1014910200).

Almost surely, 2^21313112310 is an apocalyptic number.

21313112310 is an abundant number, since it is smaller than the sum of its proper divisors (43641140490).

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

21313112310 is a wasteful number, since it uses less digits than its factorization.

21313112310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11276802 (or 11276796 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21313112310 its reverse (1321131312), we get a palindrome (22634243622).

The spelling of 21313112310 in words is "twenty-one billion, three hundred thirteen million, one hundred twelve thousand, three hundred ten".