12621512001 has 8 divisors (see below), whose sum is σ = 19232780224. Its totient is φ = 7212292560.

The previous prime is 12621511999. The next prime is 12621512003. The reversal of 12621512001 is 10021512621.

12621512001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12621511999) and next prime (12621512003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12621512001 - 2¹ = 12621511999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 601024381 = 12621512001 / (1 + 2 + 6 + 2 + 1 + 5 + 1 + 2 + 0 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12621512003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300512170 + ... + 300512211.

It is an arithmetic number, because the mean of its divisors is an integer number (2404097528).

Almost surely, 2^12621512001 is an apocalyptic number.

It is an amenable number.

12621512001 is a deficient number, since it is larger than the sum of its proper divisors (6611268223).

12621512001 is an equidigital number, since it uses as much as digits as its factorization.

12621512001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601024391.

The product of its (nonzero) digits is 240, while the sum is 21.

The spelling of 12621512001 in words is "twelve billion, six hundred twenty-one million, five hundred twelve thousand, one".