21313107 has 12 divisors (see below), whose sum is σ = 30829240. Its totient is φ = 14188608.

The previous prime is 21313093. The next prime is 21313129. The reversal of 21313107 is 70131312.

It is not a de Polignac number, because 21313107 - 2⁴ = 21313091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21313107.

It is not an unprimeable number, because it can be changed into a prime (21313207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7908 + ... + 10254.

Almost surely, 2^21313107 is an apocalyptic number.

21313107 is a deficient number, since it is larger than the sum of its proper divisors (9516133).

21313107 is a wasteful number, since it uses less digits than its factorization.

21313107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3359 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 21313107 is about 4616.6120694726. The cubic root of 21313107 is about 277.2568310482.

Adding to 21313107 its reverse (70131312), we get a palindrome (91444419).

The spelling of 21313107 in words is "twenty-one million, three hundred thirteen thousand, one hundred seven".