12621546015601 has 4 divisors (see below), whose sum is σ = 12835470524400. Its totient is φ = 12407621506804.

The previous prime is 12621546015569. The next prime is 12621546015779. The reversal of 12621546015601 is 10651064512621.

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 12621546015601 - 2⁵ = 12621546015569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12621546019601) 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, 106962254311 + ... + 106962254428.

It is an arithmetic number, because the mean of its divisors is an integer number (3208867631100).

Almost surely, 2^{12621546015601} is an apocalyptic number.

It is an amenable number.

12621546015601 is a deficient number, since it is larger than the sum of its proper divisors (213924508799).

12621546015601 is an equidigital number, since it uses as much as digits as its factorization.

12621546015601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213924508798.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 12621546015601 in words is "twelve trillion, six hundred twenty-one billion, five hundred forty-six million, fifteen thousand, six hundred one".