12521044997 has 2 divisors, whose sum is σ = 12521044998. Its totient is φ = 12521044996.

The previous prime is 12521044967. The next prime is 12521045021. The reversal of 12521044997 is 79944012521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12515120641 + 5924356 = 111871^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 12521044997 - 2⁶ = 12521044933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521044967) 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, 6260522498 + 6260522499.

It is an arithmetic number, because the mean of its divisors is an integer number (6260522499).

Almost surely, 2^12521044997 is an apocalyptic number.

It is an amenable number.

12521044997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521044997 is an equidigital number, since it uses as much as digits as its factorization.

12521044997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 12521044997 in words is "twelve billion, five hundred twenty-one million, forty-four thousand, nine hundred ninety-seven".