22100220121 has 4 divisors (see below), whose sum is σ = 25257394432. Its totient is φ = 18943045812.

The previous prime is 22100220113. The next prime is 22100220221. The reversal of 22100220121 is 12102200122.

It is a happy number.

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 22100220121 - 2³ = 22100220113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22100220221) 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, 1578587145 + ... + 1578587158.

It is an arithmetic number, because the mean of its divisors is an integer number (6314348608).

Almost surely, 2^22100220121 is an apocalyptic number.

It is an amenable number.

22100220121 is a deficient number, since it is larger than the sum of its proper divisors (3157174311).

22100220121 is an equidigital number, since it uses as much as digits as its factorization.

22100220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157174310.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22100220121 its reverse (12102200122), we get a palindrome (34202420243).

The spelling of 22100220121 in words is "twenty-two billion, one hundred million, two hundred twenty thousand, one hundred twenty-one".