12135501227 has 2 divisors, whose sum is σ = 12135501228. Its totient is φ = 12135501226.

The previous prime is 12135501139. The next prime is 12135501311. The reversal of 12135501227 is 72210553121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12135501227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12135501227.

It is not a weakly prime, because it can be changed into another prime (12135501127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067750613 + 6067750614.

It is an arithmetic number, because the mean of its divisors is an integer number (6067750614).

Almost surely, 2^12135501227 is an apocalyptic number.

12135501227 is a deficient number, since it is larger than the sum of its proper divisors (1).

12135501227 is an equidigital number, since it uses as much as digits as its factorization.

12135501227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The spelling of 12135501227 in words is "twelve billion, one hundred thirty-five million, five hundred one thousand, two hundred twenty-seven".