12520112551 has 4 divisors (see below), whose sum is σ = 12951840600. Its totient is φ = 12088384504.

The previous prime is 12520112509. The next prime is 12520112557. The reversal of 12520112551 is 15521102521.

It is a happy number.

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 12520112551 - 2¹¹ = 12520110503 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 (12520112557) 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, 215863981 + ... + 215864038.

It is an arithmetic number, because the mean of its divisors is an integer number (3237960150).

Almost surely, 2^12520112551 is an apocalyptic number.

12520112551 is a deficient number, since it is larger than the sum of its proper divisors (431728049).

12520112551 is an equidigital number, since it uses as much as digits as its factorization.

12520112551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431728048.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 12520112551 in words is "twelve billion, five hundred twenty million, one hundred twelve thousand, five hundred fifty-one".