13033072921 has 4 divisors (see below), whose sum is σ = 14217897744. Its totient is φ = 11848248100.

The previous prime is 13033072901. The next prime is 13033072939. The reversal of 13033072921 is 12927033031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13033072921 - 2¹³ = 13033064729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13033072901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592412395 + ... + 592412416.

It is an arithmetic number, because the mean of its divisors is an integer number (3554474436).

Almost surely, 2^13033072921 is an apocalyptic number.

13033072921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13033072921 is a deficient number, since it is larger than the sum of its proper divisors (1184824823).

13033072921 is a wasteful number, since it uses less digits than its factorization.

13033072921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184824822.

The product of its (nonzero) digits is 6804, while the sum is 31.

The spelling of 13033072921 in words is "thirteen billion, thirty-three million, seventy-two thousand, nine hundred twenty-one".