222222221121 has 8 divisors (see below), whose sum is σ = 299625467040. Its totient is φ = 146483561312.

The previous prime is 222222221113. The next prime is 222222221173. The reversal of 222222221121 is 121122222222.

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 222222221121 - 2³ = 222222221113 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 416146215 + ... + 416146748.

It is an arithmetic number, because the mean of its divisors is an integer number (37453183380).

Almost surely, 2^222222221121 is an apocalyptic number.

It is an amenable number.

222222221121 is a deficient number, since it is larger than the sum of its proper divisors (77403245919).

222222221121 is an equidigital number, since it uses as much as digits as its factorization.

222222221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832293055.

The product of its digits is 512, while the sum is 21.

Adding to 222222221121 its reverse (121122222222), we get a palindrome (343344443343).

The spelling of 222222221121 in words is "two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".