22221112022021 has 12 divisors (see below), whose sum is σ = 24676661348556. Its totient is φ = 19992753073920.

The previous prime is 22221112021987. The next prime is 22221112022059. The reversal of 22221112022021 is 12022021112222.

It can be written as a sum of positive squares in 2 ways, for example, as 7004200437025 + 15216911584996 = 2646545^2 + 3900886^2 .

It is not a de Polignac number, because 22221112022021 - 2¹⁰ = 22221112020997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221112021984 and 22221112022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221112028021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946614830 + ... + 946638303.

It is an arithmetic number, because the mean of its divisors is an integer number (2056388445713).

Almost surely, 2^{22221112022021} is an apocalyptic number.

It is an amenable number.

22221112022021 is a deficient number, since it is larger than the sum of its proper divisors (2455549326535).

22221112022021 is a wasteful number, since it uses less digits than its factorization.

22221112022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893253252 (or 1893253241 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22221112022021 its reverse (12022021112222), we get a palindrome (34243133134243).

The spelling of 22221112022021 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twelve million, twenty-two thousand, twenty-one".