111111001012 has 48 divisors (see below), whose sum is σ = 232343536320. Its totient is φ = 45895001600.

The previous prime is 111111001003. The next prime is 111111001013. The reversal of 111111001012 is 210100111111.

It is a self number, because there is not a number n which added to its sum of digits gives 111111001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111001013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2539414 + ... + 2582797.

It is an arithmetic number, because the mean of its divisors is an integer number (4840490340).

Almost surely, 2^111111001012 is an apocalyptic number.

It is an amenable number.

111111001012 is an abundant number, since it is smaller than the sum of its proper divisors (121232535308).

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

111111001012 is a wasteful number, since it uses less digits than its factorization.

111111001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122272 (or 5122270 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 111111001012 its reverse (210100111111), we get a palindrome (321211112123).

The spelling of 111111001012 in words is "one hundred eleven billion, one hundred eleven million, one thousand, twelve".