111222223212 has 48 divisors (see below), whose sum is σ = 268165158912. Its totient is φ = 35841296640.

The previous prime is 111222223187. The next prime is 111222223219. The reversal of 111222223212 is 212322222111.

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

It is not an unprimeable number, because it can be changed into a prime (111222223219) 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, 210433 + ... + 516455.

It is an arithmetic number, because the mean of its divisors is an integer number (5586774144).

Almost surely, 2^111222223212 is an apocalyptic number.

111222223212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111222223212 is an abundant number, since it is smaller than the sum of its proper divisors (156942935700).

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

111222223212 is a wasteful number, since it uses less digits than its factorization.

111222223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307038 (or 307036 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

Adding to 111222223212 its reverse (212322222111), we get a palindrome (323544445323).

The spelling of 111222223212 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twenty-three thousand, two hundred twelve".