12416406621 has 4 divisors (see below), whose sum is σ = 16555208832. Its totient is φ = 8277604412.

The previous prime is 12416406617. The next prime is 12416406631. The reversal of 12416406621 is 12660461421.

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 12416406621 - 2² = 12416406617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12416406631) 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, 2069401101 + ... + 2069401106.

It is an arithmetic number, because the mean of its divisors is an integer number (4138802208).

Almost surely, 2^12416406621 is an apocalyptic number.

It is an amenable number.

12416406621 is a deficient number, since it is larger than the sum of its proper divisors (4138802211).

12416406621 is an equidigital number, since it uses as much as digits as its factorization.

12416406621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138802210.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 12416406621 in words is "twelve billion, four hundred sixteen million, four hundred six thousand, six hundred twenty-one".