126315112251 has 4 divisors (see below), whose sum is σ = 168420149672. Its totient is φ = 84210074832.

The previous prime is 126315112229. The next prime is 126315112279. The reversal of 126315112251 is 152211513621.

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

It is not a de Polignac number, because 126315112251 - 2⁹ = 126315111739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126315112151) 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, 21052518706 + ... + 21052518711.

It is an arithmetic number, because the mean of its divisors is an integer number (42105037418).

Almost surely, 2^126315112251 is an apocalyptic number.

126315112251 is a deficient number, since it is larger than the sum of its proper divisors (42105037421).

126315112251 is an equidigital number, since it uses as much as digits as its factorization.

126315112251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42105037420.

The product of its digits is 3600, while the sum is 30.

Adding to 126315112251 its reverse (152211513621), we get a palindrome (278526625872).

The spelling of 126315112251 in words is "one hundred twenty-six billion, three hundred fifteen million, one hundred twelve thousand, two hundred fifty-one".