111212111100 has 36 divisors (see below), whose sum is σ = 321773708984. Its totient is φ = 29656562880.

The previous prime is 111212111083. The next prime is 111212111119. The reversal of 111212111100 is 1111212111.

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

It is a congruent number.

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, 185353219 + ... + 185353818.

Almost surely, 2^111212111100 is an apocalyptic number.

111212111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212111100 is an abundant number, since it is smaller than the sum of its proper divisors (210561597884).

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

111212111100 is a wasteful number, since it uses less digits than its factorization.

111212111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370707054 (or 370707047 counting only the distinct ones).

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

Adding to 111212111100 its reverse (1111212111), we get a palindrome (112323323211).

The spelling of 111212111100 in words is "one hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred".