12156265061 has 2 divisors, whose sum is σ = 12156265062. Its totient is φ = 12156265060.

The previous prime is 12156265007. The next prime is 12156265139. The reversal of 12156265061 is 16056265121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12150652900 + 5612161 = 110230^2 + 2369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12156265061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12156265661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078132530 + 6078132531.

It is an arithmetic number, because the mean of its divisors is an integer number (6078132531).

Almost surely, 2^12156265061 is an apocalyptic number.

It is an amenable number.

12156265061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156265061 is an equidigital number, since it uses as much as digits as its factorization.

12156265061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 12156265061 in words is "twelve billion, one hundred fifty-six million, two hundred sixty-five thousand, sixty-one".