222222221131 has 4 divisors (see below), whose sum is σ = 222232939552. Its totient is φ = 222211502712.

The previous prime is 222222221113. The next prime is 222222221173. The reversal of 222222221131 is 131122222222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131122222222 = 2 ⋅65561111111.

It is a cyclic number.

It is not a de Polignac number, because 222222221131 - 2²³ = 222213832523 is a prime.

It is a super-2 number, since 2×222222221131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222222221191) 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, 5328051 + ... + 5369596.

It is an arithmetic number, because the mean of its divisors is an integer number (55558234888).

Almost surely, 2^222222221131 is an apocalyptic number.

222222221131 is a deficient number, since it is larger than the sum of its proper divisors (10718421).

222222221131 is a wasteful number, since it uses less digits than its factorization.

222222221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10718420.

The product of its digits is 768, while the sum is 22.

Adding to 222222221131 its reverse (131122222222), we get a palindrome (353344443353).

The spelling of 222222221131 in words is "two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred thirty-one".