111001001012 has 96 divisors (see below), whose sum is σ = 232545116160. Its totient is φ = 45798480000.

The previous prime is 111001000973. The next prime is 111001001021. The reversal of 111001001012 is 210100100111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2596313 + ... + 2638719.

It is an arithmetic number, because the mean of its divisors is an integer number (2422344960).

Almost surely, 2^111001001012 is an apocalyptic number.

It is an amenable number.

111001001012 is an abundant number, since it is smaller than the sum of its proper divisors (121544115148).

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

111001001012 is a wasteful number, since it uses less digits than its factorization.

111001001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42573 (or 42571 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111001001012 its reverse (210100100111), we get a palindrome (321101101123).

Subtracting 111001001012 from its reverse (210100100111), we obtain a palindrome (99099099099).

The spelling of 111001001012 in words is "one hundred eleven billion, one million, one thousand, twelve".