111231012 has 48 divisors (see below), whose sum is σ = 263721920. Its totient is φ = 36484992.

The previous prime is 111231011. The next prime is 111231019. The reversal of 111231012 is 210132111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (111231011) 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, 362163 + ... + 362469.

Almost surely, 2^111231012 is an apocalyptic number.

111231012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111231012 is an abundant number, since it is smaller than the sum of its proper divisors (152490908).

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

111231012 is a wasteful number, since it uses less digits than its factorization.

111231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 111231012 is about 10546.6113989281. The cubic root of 111231012 is about 480.9227216096.

Adding to 111231012 its reverse (210132111), we get a palindrome (321363123).

The spelling of 111231012 in words is "one hundred eleven million, two hundred thirty-one thousand, twelve".