12510115291 has 4 divisors (see below), whose sum is σ = 12589797712. Its totient is φ = 12430432872.

The previous prime is 12510115271. The next prime is 12510115301. The reversal of 12510115291 is 19251101521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19251101521 = 2243 ⋅8582747.

It is a cyclic number.

It is not a de Polignac number, because 12510115291 - 2²¹ = 12508018139 is a prime.

It is a super-2 number, since 2×12510115291² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12510115271) 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, 39840975 + ... + 39841288.

It is an arithmetic number, because the mean of its divisors is an integer number (3147449428).

Almost surely, 2^12510115291 is an apocalyptic number.

12510115291 is a deficient number, since it is larger than the sum of its proper divisors (79682421).

12510115291 is an equidigital number, since it uses as much as digits as its factorization.

12510115291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79682420.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 12510115291 in words is "twelve billion, five hundred ten million, one hundred fifteen thousand, two hundred ninety-one".