21002222013313 has 4 divisors (see below), whose sum is σ = 21107760817600. Its totient is φ = 20896683209028.

The previous prime is 21002222013263. The next prime is 21002222013337. The reversal of 21002222013313 is 31331022220012.

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 a de Polignac number, because none of the positive numbers 2^k-21002222013313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002222013413) 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, 52769401845 + ... + 52769402242.

It is an arithmetic number, because the mean of its divisors is an integer number (5276940204400).

Almost surely, 2^{21002222013313} is an apocalyptic number.

It is an amenable number.

21002222013313 is a deficient number, since it is larger than the sum of its proper divisors (105538804287).

21002222013313 is a wasteful number, since it uses less digits than its factorization.

21002222013313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105538804286.

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

Adding to 21002222013313 its reverse (31331022220012), we get a palindrome (52333244233325).

The spelling of 21002222013313 in words is "twenty-one trillion, two billion, two hundred twenty-two million, thirteen thousand, three hundred thirteen".