12256520011151 has 32 divisors (see below), whose sum is σ = 13425396219648. Its totient is φ = 11121405419520.

The previous prime is 12256520011123. The next prime is 12256520011157. The reversal of 12256520011151 is 15111002565221.

It is a cyclic number.

It is not a de Polignac number, because 12256520011151 - 2³⁸ = 11981642104207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256520011157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251489456 + ... + 251538186.

It is an arithmetic number, because the mean of its divisors is an integer number (419543631864).

Almost surely, 2^{12256520011151} is an apocalyptic number.

12256520011151 is a deficient number, since it is larger than the sum of its proper divisors (1168876208497).

12256520011151 is a wasteful number, since it uses less digits than its factorization.

12256520011151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49991.

The product of its (nonzero) digits is 6000, while the sum is 32.

Adding to 12256520011151 its reverse (15111002565221), we get a palindrome (27367522576372).

The spelling of 12256520011151 in words is "twelve trillion, two hundred fifty-six billion, five hundred twenty million, eleven thousand, one hundred fifty-one".