202222111111021 has 4 divisors (see below), whose sum is σ = 202558587170044. Its totient is φ = 201885635052000.

The previous prime is 202222111110967. The next prime is 202222111111123. The reversal of 202222111111021 is 120111111222202.

It is a happy number.

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 132786788589225 + 69435322521796 = 11523315^2 + 8332786^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222111111021 - 2¹⁹ = 202222110586733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202222111111021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222111111921) 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, 168238028610 + ... + 168238029811.

It is an arithmetic number, because the mean of its divisors is an integer number (50639646792511).

Almost surely, 2^{202222111111021} is an apocalyptic number.

It is an amenable number.

202222111111021 is a deficient number, since it is larger than the sum of its proper divisors (336476059023).

202222111111021 is an equidigital number, since it uses as much as digits as its factorization.

202222111111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336476059022.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 202222111111021 its reverse (120111111222202), we get a palindrome (322333222333223).

The spelling of 202222111111021 in words is "two hundred two trillion, two hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, twenty-one".