111111021200100 has 36 divisors (see below), whose sum is σ = 321481221339824. Its totient is φ = 29629605653280.

The previous prime is 111111021200033. The next prime is 111111021200117. The reversal of 111111021200100 is 1002120111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185185035034 + ... + 185185035633.

Almost surely, 2^{111111021200100} is an apocalyptic number.

111111021200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111021200100 is an abundant number, since it is smaller than the sum of its proper divisors (210370200139724).

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

111111021200100 is a wasteful number, since it uses less digits than its factorization.

111111021200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370370070684 (or 370370070677 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111111021200100 its reverse (1002120111111), we get a palindrome (112113141311211).

The spelling of 111111021200100 in words is "one hundred eleven trillion, one hundred eleven billion, twenty-one million, two hundred thousand, one hundred".