12111111222 has 32 divisors (see below), whose sum is σ = 27688614912. Its totient is φ = 3459558144.

The previous prime is 12111111211. The next prime is 12111111269. The reversal of 12111111222 is 22211111121.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178438 + ... + 236774.

It is an arithmetic number, because the mean of its divisors is an integer number (865269216).

Almost surely, 2^12111111222 is an apocalyptic number.

12111111222 is an abundant number, since it is smaller than the sum of its proper divisors (15577503690).

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

12111111222 is a wasteful number, since it uses less digits than its factorization.

12111111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63292.

The product of its digits is 16, while the sum is 15.

Adding to 12111111222 its reverse (22211111121), we get a palindrome (34322222343).

The spelling of 12111111222 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-two".