21222313333013 has 4 divisors (see below), whose sum is σ = 22854798974028. Its totient is φ = 19589827692000.

The previous prime is 21222313332937. The next prime is 21222313333037. The reversal of 21222313333013 is 31033331322212.

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 1754822141809 + 19467491191204 = 1324697^2 + 4412198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222313333013 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 (21222313333513) 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, 816242820488 + ... + 816242820513.

It is an arithmetic number, because the mean of its divisors is an integer number (5713699743507).

Almost surely, 2^{21222313333013} is an apocalyptic number.

It is an amenable number.

21222313333013 is a deficient number, since it is larger than the sum of its proper divisors (1632485641015).

21222313333013 is a wasteful number, since it uses less digits than its factorization.

21222313333013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632485641014.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21222313333013 its reverse (31033331322212), we get a palindrome (52255644655225).

The spelling of 21222313333013 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred thirteen million, three hundred thirty-three thousand, thirteen".