111201212102100 has 72 divisors (see below), whose sum is σ = 321985734385728. Its totient is φ = 29631208569600.

The previous prime is 111201212102039. The next prime is 111201212102129. The reversal of 111201212102100 is 1201212102111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111201212102100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139902984 + ... + 140695583.

Almost surely, 2^{111201212102100} is an apocalyptic number.

111201212102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201212102100 is an abundant number, since it is smaller than the sum of its proper divisors (210784522283628).

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

111201212102100 is a wasteful number, since it uses less digits than its factorization.

111201212102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280599905 (or 280599898 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111201212102100 its reverse (1201212102111), we get a palindrome (112402424204211).

The spelling of 111201212102100 in words is "one hundred eleven trillion, two hundred one billion, two hundred twelve million, one hundred two thousand, one hundred".