12312025421 has 4 divisors (see below), whose sum is σ = 12383193372. Its totient is φ = 12240857472.

The previous prime is 12312025399. The next prime is 12312025433. The reversal of 12312025421 is 12452021321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12009091396 + 302934025 = 109586^2 + 17405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12312025421 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 (12312025321) 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, 35583716 + ... + 35584061.

It is an arithmetic number, because the mean of its divisors is an integer number (3095798343).

Almost surely, 2^12312025421 is an apocalyptic number.

It is an amenable number.

12312025421 is a deficient number, since it is larger than the sum of its proper divisors (71167951).

12312025421 is an equidigital number, since it uses as much as digits as its factorization.

12312025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71167950.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12312025421 its reverse (12452021321), we get a palindrome (24764046742).

The spelling of 12312025421 in words is "twelve billion, three hundred twelve million, twenty-five thousand, four hundred twenty-one".