13056732221 has 4 divisors (see below), whose sum is σ = 14061096252. Its totient is φ = 12052368192.

The previous prime is 13056732217. The next prime is 13056732257. The reversal of 13056732221 is 12223765031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8101980121 + 4954752100 = 90011^2 + 70390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13056732221 - 2² = 13056732217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13056732421) 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 3 ways as a sum of consecutive naturals, for example, 502181996 + ... + 502182021.

It is an arithmetic number, because the mean of its divisors is an integer number (3515274063).

Almost surely, 2^13056732221 is an apocalyptic number.

It is an amenable number.

13056732221 is a deficient number, since it is larger than the sum of its proper divisors (1004364031).

13056732221 is a wasteful number, since it uses less digits than its factorization.

13056732221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004364030.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 13056732221 in words is "thirteen billion, fifty-six million, seven hundred thirty-two thousand, two hundred twenty-one".