22221312313 has 4 divisors (see below), whose sum is σ = 22694106240. Its totient is φ = 21748518388.

The previous prime is 22221312277. The next prime is 22221312317. The reversal of 22221312313 is 31321312222.

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 22221312313 - 2²⁵ = 22187757881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221312317) 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, 236396893 + ... + 236396986.

It is an arithmetic number, because the mean of its divisors is an integer number (5673526560).

Almost surely, 2^22221312313 is an apocalyptic number.

It is an amenable number.

22221312313 is a deficient number, since it is larger than the sum of its proper divisors (472793927).

22221312313 is an equidigital number, since it uses as much as digits as its factorization.

22221312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472793926.

The product of its digits is 864, while the sum is 22.

Adding to 22221312313 its reverse (31321312222), we get a palindrome (53542624535).

Subtracting 22221312313 from its reverse (31321312222), we obtain a palindrome (9099999909).

The spelling of 22221312313 in words is "twenty-two billion, two hundred twenty-one million, three hundred twelve thousand, three hundred thirteen".