22111221121 has 8 divisors (see below), whose sum is σ = 24127070688. Its totient is φ = 20096328000.

The previous prime is 22111221089. The next prime is 22111221137. The reversal of 22111221121 is 12112211122.

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

It is a cyclic number.

It is not a de Polignac number, because 22111221121 - 2⁵ = 22111221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111221095 and 22111221104.

It is not an unprimeable number, because it can be changed into a prime (22111221161) 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, 190335 + ... + 283636.

It is an arithmetic number, because the mean of its divisors is an integer number (3015883836).

Almost surely, 2^22111221121 is an apocalyptic number.

It is an amenable number.

22111221121 is a deficient number, since it is larger than the sum of its proper divisors (2015849567).

22111221121 is a wasteful number, since it uses less digits than its factorization.

22111221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478223.

The product of its digits is 32, while the sum is 16.

Adding to 22111221121 its reverse (12112211122), we get a palindrome (34223432243).

Subtracting from 22111221121 its reverse (12112211122), we obtain a palindrome (9999009999).

The spelling of 22111221121 in words is "twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".