2022122120021 has 4 divisors (see below), whose sum is σ = 2024013722700. Its totient is φ = 2020230517344.

The previous prime is 2022122120009. The next prime is 2022122120023. The reversal of 2022122120021 is 1200212212202.

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 728102117521 + 1294020002500 = 853289^2 + 1137550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022122120021 - 2¹⁴ = 2022122103637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022122120023) 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, 945799736 + ... + 945801873.

It is an arithmetic number, because the mean of its divisors is an integer number (506003430675).

Almost surely, 2^{2022122120021} is an apocalyptic number.

It is an amenable number.

2022122120021 is a deficient number, since it is larger than the sum of its proper divisors (1891602679).

2022122120021 is a wasteful number, since it uses less digits than its factorization.

2022122120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891602678.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2022122120021 its reverse (1200212212202), we get a palindrome (3222334332223).

The spelling of 2022122120021 in words is "two trillion, twenty-two billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".