202122110022121 has 4 divisors (see below), whose sum is σ = 204680617744000. Its totient is φ = 199563602300244.

The previous prime is 202122110022089. The next prime is 202122110022149. The reversal of 202122110022121 is 121220011221202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202122110022121 - 2⁵ = 202122110022089 is a prime.

It is a super-2 number, since 2×202122110022121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202122110020121) 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, 1279253860821 + ... + 1279253860978.

It is an arithmetic number, because the mean of its divisors is an integer number (51170154436000).

Almost surely, 2^{202122110022121} is an apocalyptic number.

It is an amenable number.

202122110022121 is a deficient number, since it is larger than the sum of its proper divisors (2558507721879).

202122110022121 is an equidigital number, since it uses as much as digits as its factorization.

202122110022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558507721878.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202122110022121 its reverse (121220011221202), we get a palindrome (323342121243323).

The spelling of 202122110022121 in words is "two hundred two trillion, one hundred twenty-two billion, one hundred ten million, twenty-two thousand, one hundred twenty-one".