12312502121 has 4 divisors (see below), whose sum is σ = 12334065744. Its totient is φ = 12290938500.

The previous prime is 12312502079. The next prime is 12312502123. The reversal of 12312502121 is 12120521321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12120521321 = 10303 ⋅1176407.

It is a cyclic number.

It is not a de Polignac number, because 12312502121 - 2¹⁴ = 12312485737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312502093 and 12312502102.

It is not an unprimeable number, because it can be changed into a prime (12312502123) 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, 10780955 + ... + 10782096.

It is an arithmetic number, because the mean of its divisors is an integer number (3083516436).

Almost surely, 2^12312502121 is an apocalyptic number.

It is an amenable number.

12312502121 is a deficient number, since it is larger than the sum of its proper divisors (21563623).

12312502121 is an equidigital number, since it uses as much as digits as its factorization.

12312502121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21563622.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 12312502121 in words is "twelve billion, three hundred twelve million, five hundred two thousand, one hundred twenty-one".