111010020012 has 72 divisors (see below), whose sum is σ = 284512951632. Its totient is φ = 36491212800.

The previous prime is 111010020001. The next prime is 111010020019. The reversal of 111010020012 is 210020010111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111010019976 and 111010020003.

It is not an unprimeable number, because it can be changed into a prime (111010020019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924687 + ... + 1037817.

Almost surely, 2^111010020012 is an apocalyptic number.

111010020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111010020012 is an abundant number, since it is smaller than the sum of its proper divisors (173502931620).

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

111010020012 is a wasteful number, since it uses less digits than its factorization.

111010020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113519 (or 113514 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111010020012 its reverse (210020010111), we get a palindrome (321030030123).

Subtracting 111010020012 from its reverse (210020010111), we obtain a palindrome (99009990099).

The spelling of 111010020012 in words is "one hundred eleven billion, ten million, twenty thousand, twelve".