22112121 has 8 divisors (see below), whose sum is σ = 31217184. Its totient is φ = 13874240.

The previous prime is 22112107. The next prime is 22112141. The reversal of 22112121 is 12121122.

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 22112121 - 2⁵ = 22112089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22112097 and 22112106.

It is not an unprimeable number, because it can be changed into a prime (22112141) 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, 216735 + ... + 216836.

It is an arithmetic number, because the mean of its divisors is an integer number (3902148).

Almost surely, 2^22112121 is an apocalyptic number.

It is an amenable number.

22112121 is a deficient number, since it is larger than the sum of its proper divisors (9105063).

22112121 is a wasteful number, since it uses less digits than its factorization.

22112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433591.

The product of its digits is 16, while the sum is 12.

The square root of 22112121 is about 4702.3527090171. The cubic root of 22112121 is about 280.6791379885.

Adding to 22112121 its reverse (12121122), we get a palindrome (34233243).

Subtracting from 22112121 its reverse (12121122), we obtain a palindrome (9990999).

The spelling of 22112121 in words is "twenty-two million, one hundred twelve thousand, one hundred twenty-one".