202222022220121 has 4 divisors (see below), whose sum is σ = 202251932302644. Its totient is φ = 202192112137600.

The previous prime is 202222022220089. The next prime is 202222022220173. The reversal of 202222022220121 is 121022220222202.

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 122740607114896 + 79481415105225 = 11078836^2 + 8915235^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222022220121 - 2⁵ = 202222022220089 is a prime.

It is a super-2 number, since 2×202222022220121² (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 = 202222022220092 and 202222022220101.

It is not an unprimeable number, because it can be changed into a prime (202222022220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14955031120 + ... + 14955044641.

It is an arithmetic number, because the mean of its divisors is an integer number (50562983075661).

Almost surely, 2^{202222022220121} is an apocalyptic number.

It is an amenable number.

202222022220121 is a deficient number, since it is larger than the sum of its proper divisors (29910082523).

202222022220121 is an equidigital number, since it uses as much as digits as its factorization.

202222022220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29910082522.

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

Adding to 202222022220121 its reverse (121022220222202), we get a palindrome (323244242442323).

The spelling of 202222022220121 in words is "two hundred two trillion, two hundred twenty-two billion, twenty-two million, two hundred twenty thousand, one hundred twenty-one".