22413312421 has 4 divisors (see below), whose sum is σ = 22720344172. Its totient is φ = 22106280672.

The previous prime is 22413312413. The next prime is 22413312463. The reversal of 22413312421 is 12421331422.

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 17959752196 + 4453560225 = 134014^2 + 66735^2 .

It is a cyclic number.

It is not a de Polignac number, because 22413312421 - 2³ = 22413312413 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 (22413312491) 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, 153515766 + ... + 153515911.

It is an arithmetic number, because the mean of its divisors is an integer number (5680086043).

Almost surely, 2^22413312421 is an apocalyptic number.

It is an amenable number.

22413312421 is a deficient number, since it is larger than the sum of its proper divisors (307031751).

22413312421 is an equidigital number, since it uses as much as digits as its factorization.

22413312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307031750.

The product of its digits is 2304, while the sum is 25.

Adding to 22413312421 its reverse (12421331422), we get a palindrome (34834643843).

The spelling of 22413312421 in words is "twenty-two billion, four hundred thirteen million, three hundred twelve thousand, four hundred twenty-one".