12416422565021 has 4 divisors (see below), whose sum is σ = 12467942990844. Its totient is φ = 12364902139200.

The previous prime is 12416422565009. The next prime is 12416422565023. The reversal of 12416422565021 is 12056522461421.

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 4143545224900 + 8272877340121 = 2035570^2 + 2876261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12416422565021 - 2²² = 12416418370717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12416422565021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12416422565023) 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, 25760212550 + ... + 25760213031.

It is an arithmetic number, because the mean of its divisors is an integer number (3116985747711).

Almost surely, 2^{12416422565021} is an apocalyptic number.

It is an amenable number.

12416422565021 is a deficient number, since it is larger than the sum of its proper divisors (51520425823).

12416422565021 is an equidigital number, since it uses as much as digits as its factorization.

12416422565021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51520425822.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 12416422565021 in words is "twelve trillion, four hundred sixteen billion, four hundred twenty-two million, five hundred sixty-five thousand, twenty-one".