12521412499 has 2 divisors, whose sum is σ = 12521412500. Its totient is φ = 12521412498.

The previous prime is 12521412493. The next prime is 12521412521. The reversal of 12521412499 is 99421412521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521412499 - 2²⁹ = 11984541587 is a prime.

It is a super-2 number, since 2×12521412499² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12521412493) 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 as a sum of consecutive naturals, namely, 6260706249 + 6260706250.

It is an arithmetic number, because the mean of its divisors is an integer number (6260706250).

Almost surely, 2^12521412499 is an apocalyptic number.

12521412499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521412499 is an equidigital number, since it uses as much as digits as its factorization.

12521412499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The spelling of 12521412499 in words is "twelve billion, five hundred twenty-one million, four hundred twelve thousand, four hundred ninety-nine".