21310313100 has 72 divisors (see below), whose sum is σ = 61708290000. Its totient is φ = 5678100480.

The previous prime is 21310313083. The next prime is 21310313131. The reversal of 21310313100 is 131301312.

It is a super-2 number, since 2×21310313100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21310313100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346264 + ... + 403136.

Almost surely, 2^21310313100 is an apocalyptic number.

21310313100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310313100 is an abundant number, since it is smaller than the sum of its proper divisors (40397976900).

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

21310313100 is a wasteful number, since it uses less digits than its factorization.

21310313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58139 (or 58132 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21310313100 its reverse (131301312), we get a palindrome (21441614412).

The spelling of 21310313100 in words is "twenty-one billion, three hundred ten million, three hundred thirteen thousand, one hundred".