222222112121111 has 16 divisors (see below), whose sum is σ = 229090874205600. Its totient is φ = 215456930731008.

The previous prime is 222222112121089. The next prime is 222222112121129. The reversal of 222222112121111 is 111121211222222.

It is a cyclic number.

It is not a de Polignac number, because 222222112121111 - 2²² = 222222107926807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222112121161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153630095 + ... + 155069823.

It is an arithmetic number, because the mean of its divisors is an integer number (14318179637850).

Almost surely, 2^{222222112121111} is an apocalyptic number.

222222112121111 is a deficient number, since it is larger than the sum of its proper divisors (6868762084489).

222222112121111 is a wasteful number, since it uses less digits than its factorization.

222222112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475698.

The product of its digits is 256, while the sum is 23.

Adding to 222222112121111 its reverse (111121211222222), we get a palindrome (333343323343333).

The spelling of 222222112121111 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".