12515420001 has 16 divisors (see below), whose sum is σ = 19073876864. Its totient is φ = 7150633344.

The previous prime is 12515419979. The next prime is 12515420039. The reversal of 12515420001 is 10002451521.

It is not a de Polignac number, because 12515420001 - 2⁶ = 12515419937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12515420001.

It is not an unprimeable number, because it can be changed into a prime (12515424001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119685 + ... + 198381.

It is an arithmetic number, because the mean of its divisors is an integer number (1192117304).

Almost surely, 2^12515420001 is an apocalyptic number.

It is an amenable number.

12515420001 is a deficient number, since it is larger than the sum of its proper divisors (6558456863).

12515420001 is an equidigital number, since it uses as much as digits as its factorization.

12515420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86280.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 12515420001 its reverse (10002451521), we get a palindrome (22517871522).

The spelling of 12515420001 in words is "twelve billion, five hundred fifteen million, four hundred twenty thousand, one".