12551521293911 has 2 divisors, whose sum is σ = 12551521293912. Its totient is φ = 12551521293910.

The previous prime is 12551521293907. The next prime is 12551521294001. The reversal of 12551521293911 is 11939212515521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12551521293911 - 2² = 12551521293907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551521203911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275760646955 + 6275760646956.

It is an arithmetic number, because the mean of its divisors is an integer number (6275760646956).

Almost surely, 2^{12551521293911} is an apocalyptic number.

12551521293911 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551521293911 is an equidigital number, since it uses as much as digits as its factorization.

12551521293911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 47.

The spelling of 12551521293911 in words is "twelve trillion, five hundred fifty-one billion, five hundred twenty-one million, two hundred ninety-three thousand, nine hundred eleven".