12130444421 has 4 divisors (see below), whose sum is σ = 12657855072. Its totient is φ = 11603033772.

The previous prime is 12130444409. The next prime is 12130444433. The reversal of 12130444421 is 12444403121.

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 an interprime number because it is at equal distance from previous prime (12130444409) and next prime (12130444433).

It is a cyclic number.

It is not a de Polignac number, because 12130444421 - 2¹⁸ = 12130182277 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 (12130444021) 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, 263705291 + ... + 263705336.

It is an arithmetic number, because the mean of its divisors is an integer number (3164463768).

Almost surely, 2^12130444421 is an apocalyptic number.

It is an amenable number.

12130444421 is a deficient number, since it is larger than the sum of its proper divisors (527410651).

12130444421 is an equidigital number, since it uses as much as digits as its factorization.

12130444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527410650.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 12130444421 its reverse (12444403121), we get a palindrome (24574847542).

The spelling of 12130444421 in words is "twelve billion, one hundred thirty million, four hundred forty-four thousand, four hundred twenty-one".