22112220121 has 8 divisors (see below), whose sum is σ = 24078643200. Its totient is φ = 20226059280.

The previous prime is 22112220107. The next prime is 22112220133. The reversal of 22112220121 is 12102221122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22112220121 - 2¹⁵ = 22112187353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112220095 and 22112220104.

It is not an unprimeable number, because it can be changed into a prime (22112220521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20064985 + ... + 20066086.

It is an arithmetic number, because the mean of its divisors is an integer number (3009830400).

Almost surely, 2^22112220121 is an apocalyptic number.

It is an amenable number.

22112220121 is a deficient number, since it is larger than the sum of its proper divisors (1966423079).

22112220121 is a wasteful number, since it uses less digits than its factorization.

22112220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40131119.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22112220121 its reverse (12102221122), we get a palindrome (34214441243).

The spelling of 22112220121 in words is "twenty-two billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-one".