111213031212 has 24 divisors (see below), whose sum is σ = 288330081200. Its totient is φ = 37071010368.

The previous prime is 111213031177. The next prime is 111213031243. The reversal of 111213031212 is 212130312111.

It is a super-2 number, since 2×111213031212² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 514875037 + ... + 514875252.

Almost surely, 2^111213031212 is an apocalyptic number.

111213031212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111213031212 is an abundant number, since it is smaller than the sum of its proper divisors (177117049988).

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

111213031212 is a wasteful number, since it uses less digits than its factorization.

111213031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029750302 (or 1029750294 counting only the distinct ones).

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

Adding to 111213031212 its reverse (212130312111), we get a palindrome (323343343323).

The spelling of 111213031212 in words is "one hundred eleven billion, two hundred thirteen million, thirty-one thousand, two hundred twelve".