111111102012 has 48 divisors (see below), whose sum is σ = 259685038592. Its totient is φ = 36976262400.

The previous prime is 111111101993. The next prime is 111111102013. The reversal of 111111102012 is 210201111111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111102013) 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, 30052548 + ... + 30056244.

Almost surely, 2^111111102012 is an apocalyptic number.

111111102012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111111102012 is an abundant number, since it is smaller than the sum of its proper divisors (148573936580).

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

111111102012 is a wasteful number, since it uses less digits than its factorization.

111111102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7136 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111111102012 its reverse (210201111111), we get a palindrome (321312213123).

Subtracting 111111102012 from its reverse (210201111111), we obtain a palindrome (99090009099).

The spelling of 111111102012 in words is "one hundred eleven billion, one hundred eleven million, one hundred two thousand, twelve".