15216121344001 has 4 divisors (see below), whose sum is σ = 15222401214912. Its totient is φ = 15209841473092.

The previous prime is 15216121343999. The next prime is 15216121344041. The reversal of 15216121344001 is 10044312161251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15216121344001 - 2¹ = 15216121343999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15216121344041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3139931821 + ... + 3139936666.

It is an arithmetic number, because the mean of its divisors is an integer number (3805600303728).

Almost surely, 2^{15216121344001} is an apocalyptic number.

It is an amenable number.

15216121344001 is a deficient number, since it is larger than the sum of its proper divisors (6279870911).

15216121344001 is an equidigital number, since it uses as much as digits as its factorization.

15216121344001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6279870910.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 15216121344001 in words is "fifteen trillion, two hundred sixteen billion, one hundred twenty-one million, three hundred forty-four thousand, one".