12458256121 has 4 divisors (see below), whose sum is σ = 12458532352. Its totient is φ = 12457979892.

The previous prime is 12458256101. The next prime is 12458256157. The reversal of 12458256121 is 12165285421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12458256121 - 2¹⁵ = 12458223353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12458256101) 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, 52965 + ... + 166498.

It is an arithmetic number, because the mean of its divisors is an integer number (3114633088).

Almost surely, 2^12458256121 is an apocalyptic number.

It is an amenable number.

12458256121 is a deficient number, since it is larger than the sum of its proper divisors (276231).

12458256121 is an equidigital number, since it uses as much as digits as its factorization.

12458256121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276230.

The product of its digits is 38400, while the sum is 37.

The spelling of 12458256121 in words is "twelve billion, four hundred fifty-eight million, two hundred fifty-six thousand, one hundred twenty-one".