111212101212100 has 36 divisors (see below), whose sum is σ = 275806011007744. Its totient is φ = 38129863272480.

The previous prime is 111212101212061. The next prime is 111212101212133. The reversal of 111212101212100 is 1212101212111.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79437214452 + ... + 79437215851.

Almost surely, 2^{111212101212100} is an apocalyptic number.

111212101212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212101212100 is an abundant number, since it is smaller than the sum of its proper divisors (164593909795644).

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

111212101212100 is a wasteful number, since it uses less digits than its factorization.

111212101212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158874430324 (or 158874430317 counting only the distinct ones).

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

Adding to 111212101212100 its reverse (1212101212111), we get a palindrome (112424202424211).

The spelling of 111212101212100 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred twelve thousand, one hundred".