12501651402109 has 2 divisors, whose sum is σ = 12501651402110. Its totient is φ = 12501651402108.

The previous prime is 12501651402091. The next prime is 12501651402113. The reversal of 12501651402109 is 90120415610521.

Together with previous prime (12501651402091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7985835150084 + 4515816252025 = 2825922^2 + 2125045^2 .

It is a cyclic number.

It is not a de Polignac number, because 12501651402109 - 2⁵ = 12501651402077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12501651402199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250825701054 + 6250825701055.

It is an arithmetic number, because the mean of its divisors is an integer number (6250825701055).

Almost surely, 2^{12501651402109} is an apocalyptic number.

It is an amenable number.

12501651402109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501651402109 is an equidigital number, since it uses as much as digits as its factorization.

12501651402109 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 37.

The spelling of 12501651402109 in words is "twelve trillion, five hundred one billion, six hundred fifty-one million, four hundred two thousand, one hundred nine".