111111201012100 has 18 divisors (see below), whose sum is σ = 241111306196474. Its totient is φ = 44444480404800.

The previous prime is 111111201012079. The next prime is 111111201012137. The reversal of 111111201012100 is 1210102111111.

It can be written as a sum of positive squares in 3 ways, for example, as 1474218502276 + 109636982509824 = 1214174^2 + 10470768^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555556004961 + ... + 555556005160.

Almost surely, 2^{111111201012100} is an apocalyptic number.

111111201012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111201012100 is an abundant number, since it is smaller than the sum of its proper divisors (130000105184374).

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

111111201012100 is a wasteful number, since it uses less digits than its factorization.

111111201012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111112010135 (or 1111112010128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111111201012100 its reverse (1210102111111), we get a palindrome (112321303123211).

The spelling of 111111201012100 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred one million, twelve thousand, one hundred".