12507509213 has 4 divisors (see below), whose sum is σ = 12507744540. Its totient is φ = 12507273888.

The previous prime is 12507509177. The next prime is 12507509249. The reversal of 12507509213 is 31290570521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12507509177) and next prime (12507509249).

It can be written as a sum of positive squares in 2 ways, for example, as 10974238564 + 1533270649 = 104758^2 + 39157^2 .

It is a cyclic number.

It is not a de Polignac number, because 12507509213 - 2⁶ = 12507509149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12507709213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3983 + ... + 158211.

It is an arithmetic number, because the mean of its divisors is an integer number (3126936135).

Almost surely, 2^12507509213 is an apocalyptic number.

It is an amenable number.

12507509213 is a deficient number, since it is larger than the sum of its proper divisors (235327).

12507509213 is an equidigital number, since it uses as much as digits as its factorization.

12507509213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235326.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 12507509213 in words is "twelve billion, five hundred seven million, five hundred nine thousand, two hundred thirteen".