13056640221 has 8 divisors (see below), whose sum is σ = 17415080064. Its totient is φ = 8701313600.

The previous prime is 13056640193. The next prime is 13056640241. The reversal of 13056640221 is 12204665031.

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 13056640221 - 2⁹ = 13056639709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13056640241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768501 + ... + 785306.

It is an arithmetic number, because the mean of its divisors is an integer number (2176885008).

Almost surely, 2^13056640221 is an apocalyptic number.

It is an amenable number.

13056640221 is a deficient number, since it is larger than the sum of its proper divisors (4358439843).

13056640221 is a wasteful number, since it uses less digits than its factorization.

13056640221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556611.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 13056640221 in words is "thirteen billion, fifty-six million, six hundred forty thousand, two hundred twenty-one".