12126625261 has 2 divisors, whose sum is σ = 12126625262. Its totient is φ = 12126625260.

The previous prime is 12126625223. The next prime is 12126625289. The reversal of 12126625261 is 16252662121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10888922500 + 1237702761 = 104350^2 + 35181^2 .

It is a cyclic number.

It is not a de Polignac number, because 12126625261 - 2¹⁷ = 12126494189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12126625211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6063312630 + 6063312631.

It is an arithmetic number, because the mean of its divisors is an integer number (6063312631).

Almost surely, 2^12126625261 is an apocalyptic number.

It is an amenable number.

12126625261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12126625261 is an equidigital number, since it uses as much as digits as its factorization.

12126625261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The spelling of 12126625261 in words is "twelve billion, one hundred twenty-six million, six hundred twenty-five thousand, two hundred sixty-one".