21313300124 has 6 divisors (see below), whose sum is σ = 37298275224. Its totient is φ = 10656650060.

The previous prime is 21313300109. The next prime is 21313300139. The reversal of 21313300124 is 42100331312.

It is an interprime number because it is at equal distance from previous prime (21313300109) and next prime (21313300139).

It is a junction number, because it is equal to n+sod(n) for n = 21313300096 and 21313300105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664162512 + ... + 2664162519.

It is an arithmetic number, because the mean of its divisors is an integer number (6216379204).

Almost surely, 2^21313300124 is an apocalyptic number.

It is an amenable number.

21313300124 is a deficient number, since it is larger than the sum of its proper divisors (15984975100).

21313300124 is a wasteful number, since it uses less digits than its factorization.

21313300124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328325035 (or 5328325033 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21313300124 its reverse (42100331312), we get a palindrome (63413631436).

The spelling of 21313300124 in words is "twenty-one billion, three hundred thirteen million, three hundred thousand, one hundred twenty-four".