13012655921 has 8 divisors (see below), whose sum is σ = 13204773120. Its totient is φ = 12821380272.

The previous prime is 13012655897. The next prime is 13012655923. The reversal of 13012655921 is 12955621031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13012655921 - 2²² = 13008461617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13012655923) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 179201 + ... + 241118.

It is an arithmetic number, because the mean of its divisors is an integer number (1650596640).

Almost surely, 2^13012655921 is an apocalyptic number.

It is an amenable number.

13012655921 is a deficient number, since it is larger than the sum of its proper divisors (192117199).

13012655921 is an equidigital number, since it uses as much as digits as its factorization.

13012655921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420775.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 13012655921 in words is "thirteen billion, twelve million, six hundred fifty-five thousand, nine hundred twenty-one".