20222313111221 has 4 divisors (see below), whose sum is σ = 21777875658252. Its totient is φ = 18666750564192.

The previous prime is 20222313111211. The next prime is 20222313111233. The reversal of 20222313111221 is 12211131322202.

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 7668684639121 + 12553628472100 = 2769239^2 + 3543110^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222313111221 - 2³⁴ = 20205133242037 is a prime.

It is a super-2 number, since 2×20222313111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222313111211) 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, 777781273496 + ... + 777781273521.

It is an arithmetic number, because the mean of its divisors is an integer number (5444468914563).

Almost surely, 2^{20222313111221} is an apocalyptic number.

It is an amenable number.

20222313111221 is a deficient number, since it is larger than the sum of its proper divisors (1555562547031).

20222313111221 is a wasteful number, since it uses less digits than its factorization.

20222313111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555562547030.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20222313111221 its reverse (12211131322202), we get a palindrome (32433444433423).

The spelling of 20222313111221 in words is "twenty trillion, two hundred twenty-two billion, three hundred thirteen million, one hundred eleven thousand, two hundred twenty-one".