12513422021 has 16 divisors (see below), whose sum is σ = 13799600640. Its totient is φ = 11294118000.

The previous prime is 12513421981. The next prime is 12513422023. The reversal of 12513422021 is 12022431521.

It is a cyclic number.

It is not a de Polignac number, because 12513422021 - 2²⁶ = 12446313157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513422023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52646 + ... + 166728.

It is an arithmetic number, because the mean of its divisors is an integer number (862475040).

Almost surely, 2^12513422021 is an apocalyptic number.

It is an amenable number.

12513422021 is a deficient number, since it is larger than the sum of its proper divisors (1286178619).

12513422021 is a wasteful number, since it uses less digits than its factorization.

12513422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114376.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12513422021 its reverse (12022431521), we get a palindrome (24535853542).

The spelling of 12513422021 in words is "twelve billion, five hundred thirteen million, four hundred twenty-two thousand, twenty-one".