11257515123 has 4 divisors (see below), whose sum is σ = 15010020168. Its totient is φ = 7505010080.

The previous prime is 11257515109. The next prime is 11257515127. The reversal of 11257515123 is 32151575211.

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

It is a cyclic number.

It is not a de Polignac number, because 11257515123 - 2²⁶ = 11190406259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11257515127) 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, 1876252518 + ... + 1876252523.

It is an arithmetic number, because the mean of its divisors is an integer number (3752505042).

Almost surely, 2^11257515123 is an apocalyptic number.

11257515123 is a deficient number, since it is larger than the sum of its proper divisors (3752505045).

11257515123 is an equidigital number, since it uses as much as digits as its factorization.

11257515123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752505044.

The product of its digits is 10500, while the sum is 33.

The spelling of 11257515123 in words is "eleven billion, two hundred fifty-seven million, five hundred fifteen thousand, one hundred twenty-three".