12053716421 has 4 divisors (see below), whose sum is σ = 12577791072. Its totient is φ = 11529641772.

The previous prime is 12053716393. The next prime is 12053716429. The reversal of 12053716421 is 12461735021.

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 12053716421 - 2⁶ = 12053716357 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 (12053716429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262037291 + ... + 262037336.

It is an arithmetic number, because the mean of its divisors is an integer number (3144447768).

Almost surely, 2^12053716421 is an apocalyptic number.

It is an amenable number.

12053716421 is a deficient number, since it is larger than the sum of its proper divisors (524074651).

12053716421 is an equidigital number, since it uses as much as digits as its factorization.

12053716421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524074650.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 12053716421 in words is "twelve billion, fifty-three million, seven hundred sixteen thousand, four hundred twenty-one".