22202020121 has 4 divisors (see below), whose sum is σ = 22204367412. Its totient is φ = 22199672832.

The previous prime is 22202020051. The next prime is 22202020147. The reversal of 22202020121 is 12102020222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12102020222 = 2 ⋅6051010111.

It can be written as a sum of positive squares in 2 ways, for example, as 4268792896 + 17933227225 = 65336^2 + 133915^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202020121 - 2¹⁰ = 22202019097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22202020096 and 22202020105.

It is not an unprimeable number, because it can be changed into a prime (22202020171) 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 3 ways as a sum of consecutive naturals, for example, 1159400 + ... + 1178393.

It is an arithmetic number, because the mean of its divisors is an integer number (5551091853).

Almost surely, 2^22202020121 is an apocalyptic number.

It is an amenable number.

22202020121 is a deficient number, since it is larger than the sum of its proper divisors (2347291).

22202020121 is an equidigital number, since it uses as much as digits as its factorization.

22202020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347290.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22202020121 its reverse (12102020222), we get a palindrome (34304040343).

It can be divided in two parts, 222020201 and 21, that added together give a palindrome (222020222).

The spelling of 22202020121 in words is "twenty-two billion, two hundred two million, twenty thousand, one hundred twenty-one".