15112324113221 has 12 divisors (see below), whose sum is σ = 15259606387620. Its totient is φ = 14966373112320.

The previous prime is 15112324113209. The next prime is 15112324113317. The reversal of 15112324113221 is 12231142321151.

It can be written as a sum of positive squares in 6 ways, for example, as 3446277025 + 15108877836196 = 58705^2 + 3887014^2 .

It is not a de Polignac number, because 15112324113221 - 2⁶ = 15112324113157 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 (15112324116221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6945485 + ... + 8858013.

It is an arithmetic number, because the mean of its divisors is an integer number (1271633865635).

Almost surely, 2^{15112324113221} is an apocalyptic number.

It is an amenable number.

15112324113221 is a deficient number, since it is larger than the sum of its proper divisors (147282274399).

15112324113221 is an equidigital number, since it uses as much as digits as its factorization.

15112324113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913224 (or 1913087 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

Adding to 15112324113221 its reverse (12231142321151), we get a palindrome (27343466434372).

The spelling of 15112324113221 in words is "fifteen trillion, one hundred twelve billion, three hundred twenty-four million, one hundred thirteen thousand, two hundred twenty-one".