111100021012 has 12 divisors (see below), whose sum is σ = 194428806516. Its totient is φ = 55548933440.

The previous prime is 111100021007. The next prime is 111100021033. The reversal of 111100021012 is 210120001111.

It can be written as a sum of positive squares in 2 ways, for example, as 10982201616 + 100117819396 = 104796^2 + 316414^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111100021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9289 + ... + 471472.

It is an arithmetic number, because the mean of its divisors is an integer number (16202400543).

Almost surely, 2^111100021012 is an apocalyptic number.

It is an amenable number.

111100021012 is a deficient number, since it is larger than the sum of its proper divisors (83328785504).

111100021012 is a wasteful number, since it uses less digits than its factorization.

111100021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538538 (or 538536 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111100021012 its reverse (210120001111), we get a palindrome (321220022123).

The spelling of 111100021012 in words is "one hundred eleven billion, one hundred million, twenty-one thousand, twelve".