222221220111 has 12 divisors (see below), whose sum is σ = 350166771240. Its totient is φ = 134679527280.

The previous prime is 222221220107. The next prime is 222221220127. The reversal of 222221220111 is 111022122222.

It is a happy number.

222221220111 is a `hidden beast` number, since 222 + 221 + 220 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 222221220111 - 2² = 222221220107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221220101) 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 11 ways as a sum of consecutive naturals, for example, 1122329296 + ... + 1122329493.

It is an arithmetic number, because the mean of its divisors is an integer number (29180564270).

Almost surely, 2^222221220111 is an apocalyptic number.

222221220111 is a deficient number, since it is larger than the sum of its proper divisors (127945551129).

222221220111 is a wasteful number, since it uses less digits than its factorization.

222221220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244658806 (or 2244658803 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222221220111 its reverse (111022122222), we get a palindrome (333243342333).

The spelling of 222221220111 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred eleven".