12504122251 has 12 divisors (see below), whose sum is σ = 13303845000. Its totient is φ = 11750051840.

The previous prime is 12504122249. The next prime is 12504122261. The reversal of 12504122251 is 15222140521.

It is not a de Polignac number, because 12504122251 - 2¹ = 12504122249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12504122261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151500 + ... + 218998.

It is an arithmetic number, because the mean of its divisors is an integer number (1108653750).

Almost surely, 2^12504122251 is an apocalyptic number.

12504122251 is a deficient number, since it is larger than the sum of its proper divisors (799722749).

12504122251 is an equidigital number, since it uses as much as digits as its factorization.

12504122251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68174 (or 68157 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 12504122251 its reverse (15222140521), we get a palindrome (27726262772).

The spelling of 12504122251 in words is "twelve billion, five hundred four million, one hundred twenty-two thousand, two hundred fifty-one".