222221111121 has 32 divisors (see below), whose sum is σ = 333160723200. Its totient is φ = 146378534400.

The previous prime is 222221111117. The next prime is 222221111179. The reversal of 222221111121 is 121111122222.

It is not a de Polignac number, because 222221111121 - 2² = 222221111117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222221111094 and 222221111103.

It is not an unprimeable number, because it can be changed into a prime (222221119121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1244385 + ... + 1411713.

It is an arithmetic number, because the mean of its divisors is an integer number (10411272600).

Almost surely, 2^222221111121 is an apocalyptic number.

It is an amenable number.

222221111121 is a deficient number, since it is larger than the sum of its proper divisors (110939612079).

222221111121 is a wasteful number, since it uses less digits than its factorization.

222221111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167926 (or 167920 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 222221111121 its reverse (121111122222), we get a palindrome (343332233343).

The spelling of 222221111121 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".