22120220121 has 4 divisors (see below), whose sum is σ = 29493626832. Its totient is φ = 14746813412.

The previous prime is 22120220081. The next prime is 22120220137. The reversal of 22120220121 is 12102202122.

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 22120220121 - 2¹⁴ = 22120203737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22120220121.

It is not an unprimeable number, because it can be changed into a prime (22120420121) 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, 3686703351 + ... + 3686703356.

It is an arithmetic number, because the mean of its divisors is an integer number (7373406708).

Almost surely, 2^22120220121 is an apocalyptic number.

It is an amenable number.

22120220121 is a deficient number, since it is larger than the sum of its proper divisors (7373406711).

22120220121 is an equidigital number, since it uses as much as digits as its factorization.

22120220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373406710.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22120220121 its reverse (12102202122), we get a palindrome (34222422243).

The spelling of 22120220121 in words is "twenty-two billion, one hundred twenty million, two hundred twenty thousand, one hundred twenty-one".