12615315570221 has 64 divisors (see below), whose sum is σ = 15783523123200. Its totient is φ = 9817534679040.

The previous prime is 12615315570203. The next prime is 12615315570241. The reversal of 12615315570221 is 12207551351621.

It is a cyclic number.

It is not a de Polignac number, because 12615315570221 - 2⁶ = 12615315570157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12615315570241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1740760220 + ... + 1740767466.

It is an arithmetic number, because the mean of its divisors is an integer number (246617548800).

Almost surely, 2^{12615315570221} is an apocalyptic number.

It is an amenable number.

12615315570221 is a deficient number, since it is larger than the sum of its proper divisors (3168207552979).

12615315570221 is a wasteful number, since it uses less digits than its factorization.

12615315570221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 12615315570221 in words is "twelve trillion, six hundred fifteen billion, three hundred fifteen million, five hundred seventy thousand, two hundred twenty-one".