13215152140221 has 16 divisors (see below), whose sum is σ = 17652492915200. Its totient is φ = 8793958901040.

The previous prime is 13215152140171. The next prime is 13215152140241. The reversal of 13215152140221 is 12204125151231.

It is not a de Polignac number, because 13215152140221 - 2²⁵ = 13215118585789 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 (13215152140241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21248130 + ... + 21861228.

It is an arithmetic number, because the mean of its divisors is an integer number (1103280807200).

Almost surely, 2^{13215152140221} is an apocalyptic number.

It is an amenable number.

13215152140221 is a deficient number, since it is larger than the sum of its proper divisors (4437340774979).

13215152140221 is a wasteful number, since it uses less digits than its factorization.

13215152140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626256.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 13215152140221 its reverse (12204125151231), we get a palindrome (25419277291452).

The spelling of 13215152140221 in words is "thirteen trillion, two hundred fifteen billion, one hundred fifty-two million, one hundred forty thousand, two hundred twenty-one".