222111333121 has 4 divisors (see below), whose sum is σ = 222147912772. Its totient is φ = 222074753472.

The previous prime is 222111333107. The next prime is 222111333127. The reversal of 222111333121 is 121333111222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125713502721 + 96397830400 = 354561^2 + 310480^2 .

It is a cyclic number.

It is not a de Polignac number, because 222111333121 - 2¹¹ = 222111331073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222111333092 and 222111333101.

It is not an unprimeable number, because it can be changed into a prime (222111333127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18280716 + ... + 18292861.

It is an arithmetic number, because the mean of its divisors is an integer number (55536978193).

Almost surely, 2^222111333121 is an apocalyptic number.

It is an amenable number.

222111333121 is a deficient number, since it is larger than the sum of its proper divisors (36579651).

222111333121 is an equidigital number, since it uses as much as digits as its factorization.

222111333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36579650.

The product of its digits is 432, while the sum is 22.

Adding to 222111333121 its reverse (121333111222), we get a palindrome (343444444343).

The spelling of 222111333121 in words is "two hundred twenty-two billion, one hundred eleven million, three hundred thirty-three thousand, one hundred twenty-one".