21220022313 has 96 divisors (see below), whose sum is σ = 36492318720. Its totient is φ = 11631755520.

The previous prime is 21220022261. The next prime is 21220022321. The reversal of 21220022313 is 31322002212.

It is not a de Polignac number, because 21220022313 - 2¹² = 21220018217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220022333) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68231428 + ... + 68231738.

It is an arithmetic number, because the mean of its divisors is an integer number (380128320).

Almost surely, 2^21220022313 is an apocalyptic number.

It is an amenable number.

21220022313 is a deficient number, since it is larger than the sum of its proper divisors (15272296407).

21220022313 is a wasteful number, since it uses less digits than its factorization.

21220022313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21220022313 its reverse (31322002212), we get a palindrome (52542024525).

The spelling of 21220022313 in words is "twenty-one billion, two hundred twenty million, twenty-two thousand, three hundred thirteen".