12165500051 has 2 divisors, whose sum is σ = 12165500052. Its totient is φ = 12165500050.

The previous prime is 12165500027. The next prime is 12165500059. The reversal of 12165500051 is 15000556121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12165500051 is a prime.

It is not a weakly prime, because it can be changed into another prime (12165500059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082750025 + 6082750026.

It is an arithmetic number, because the mean of its divisors is an integer number (6082750026).

Almost surely, 2^12165500051 is an apocalyptic number.

12165500051 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165500051 is an equidigital number, since it uses as much as digits as its factorization.

12165500051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 12165500051 in words is "twelve billion, one hundred sixty-five million, five hundred thousand, fifty-one".