111111020021012 has 24 divisors (see below), whose sum is σ = 215598432296352. Its totient is φ = 49677058130400.

The previous prime is 111111020020969. The next prime is 111111020021039. The reversal of 111111020021012 is 210120020111111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20698771538 + ... + 20698776905.

It is an arithmetic number, because the mean of its divisors is an integer number (8983268012348).

Almost surely, 2^{111111020021012} is an apocalyptic number.

It is an amenable number.

111111020021012 is a deficient number, since it is larger than the sum of its proper divisors (104487412275340).

111111020021012 is a wasteful number, since it uses less digits than its factorization.

111111020021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41397548519 (or 41397548517 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111020021012 its reverse (210120020111111), we get a palindrome (321231040132123).

Subtracting 111111020021012 from its reverse (210120020111111), we obtain a palindrome (99009000090099).

The spelling of 111111020021012 in words is "one hundred eleven trillion, one hundred eleven billion, twenty million, twenty-one thousand, twelve".