12521320963 has 2 divisors, whose sum is σ = 12521320964. Its totient is φ = 12521320962.

The previous prime is 12521320919. The next prime is 12521321041. The reversal of 12521320963 is 36902312521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521320963 is a prime.

It is not a weakly prime, because it can be changed into another prime (12522320963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260660481 + 6260660482.

It is an arithmetic number, because the mean of its divisors is an integer number (6260660482).

Almost surely, 2^12521320963 is an apocalyptic number.

12521320963 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521320963 is an equidigital number, since it uses as much as digits as its factorization.

12521320963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 12521320963 in words is "twelve billion, five hundred twenty-one million, three hundred twenty thousand, nine hundred sixty-three".