12501112109 has 2 divisors, whose sum is σ = 12501112110. Its totient is φ = 12501112108.

The previous prime is 12501112051. The next prime is 12501112133. The reversal of 12501112109 is 90121110521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9264640009 + 3236472100 = 96253^2 + 56890^2 .

It is a cyclic number.

It is not a de Polignac number, because 12501112109 - 2¹² = 12501108013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12501112199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250556054 + 6250556055.

It is an arithmetic number, because the mean of its divisors is an integer number (6250556055).

Almost surely, 2^12501112109 is an apocalyptic number.

It is an amenable number.

12501112109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501112109 is an equidigital number, since it uses as much as digits as its factorization.

12501112109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 12501112109 in words is "twelve billion, five hundred one million, one hundred twelve thousand, one hundred nine".