111112221222 has 48 divisors (see below), whose sum is σ = 249028699920. Its totient is φ = 35777111616.

The previous prime is 111112221193. The next prime is 111112221271. The reversal of 111112221222 is 222122211111.

111112221222 is a `hidden beast` number, since 111 + 112 + 221 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 111112221195 and 111112221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 507553 + ... + 692700.

It is an arithmetic number, because the mean of its divisors is an integer number (5188097915).

Almost surely, 2^111112221222 is an apocalyptic number.

111112221222 is an abundant number, since it is smaller than the sum of its proper divisors (137916478698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111112221222 is a wasteful number, since it uses less digits than its factorization.

111112221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200437 (or 1200434 counting only the distinct ones).

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

Adding to 111112221222 its reverse (222122211111), we get a palindrome (333234432333).

It can be divided in two parts, 11111 and 2221222, that multiplied together give a palindrome (24679997642).

The spelling of 111112221222 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".