21222052413313 has 4 divisors (see below), whose sum is σ = 21374729049520. Its totient is φ = 21069375777108.

The previous prime is 21222052413281. The next prime is 21222052413349. The reversal of 21222052413313 is 31331425022212.

It is a happy number.

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 21222052413313 - 2⁵ = 21222052413281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222052413383) 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, 76338317895 + ... + 76338318172.

It is an arithmetic number, because the mean of its divisors is an integer number (5343682262380).

Almost surely, 2^{21222052413313} is an apocalyptic number.

It is an amenable number.

21222052413313 is a deficient number, since it is larger than the sum of its proper divisors (152676636207).

21222052413313 is a wasteful number, since it uses less digits than its factorization.

21222052413313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152676636206.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 21222052413313 its reverse (31331425022212), we get a palindrome (52553477435525).

The spelling of 21222052413313 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred thirteen thousand, three hundred thirteen".