202022122222021 has 4 divisors (see below), whose sum is σ = 202025552372812. Its totient is φ = 202018692071232.

The previous prime is 202022122221961. The next prime is 202022122222027. The reversal of 202022122222021 is 120222221220202.

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 20193887925121 + 181828234296900 = 4493761^2 + 13484370^2 .

It is a cyclic number.

It is not a de Polignac number, because 202022122222021 - 2⁹ = 202022122221509 is a prime.

It is a super-2 number, since 2×202022122222021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202022122221983 and 202022122222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022122222027) 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, 1714987050 + ... + 1715104843.

It is an arithmetic number, because the mean of its divisors is an integer number (50506388093203).

Almost surely, 2^{202022122222021} is an apocalyptic number.

It is an amenable number.

202022122222021 is a deficient number, since it is larger than the sum of its proper divisors (3430150791).

202022122222021 is an equidigital number, since it uses as much as digits as its factorization.

202022122222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430150790.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 202022122222021 its reverse (120222221220202), we get a palindrome (322244343442223).

The spelling of 202022122222021 in words is "two hundred two trillion, twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".