111203311212 has 48 divisors (see below), whose sum is σ = 329491294720. Its totient is φ = 31772374416.

The previous prime is 111203311151. The next prime is 111203311237. The reversal of 111203311212 is 212113302111.

111203311212 is a `hidden beast` number, since 1 + 1 + 120 + 331 + 1 + 212 = 666.

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

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, 73546408 + ... + 73547919.

Almost surely, 2^111203311212 is an apocalyptic number.

111203311212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111203311212 is an abundant number, since it is smaller than the sum of its proper divisors (218287983508).

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

111203311212 is a wasteful number, since it uses less digits than its factorization.

111203311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147094347 (or 147094339 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111203311212 its reverse (212113302111), we get a palindrome (323316613323).

The spelling of 111203311212 in words is "one hundred eleven billion, two hundred three million, three hundred eleven thousand, two hundred twelve".