111212201100 has 864 divisors, whose sum is σ = 440334816768. Its totient is φ = 21086208000.

The previous prime is 111212201083. The next prime is 111212201119. The reversal of 111212201100 is 1102212111.

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 287 ways as a sum of consecutive naturals, for example, 432732172 + ... + 432732428.

Almost surely, 2^111212201100 is an apocalyptic number.

111212201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220167408384).

111212201100 is an abundant number, since it is smaller than the sum of its proper divisors (329122615668).

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

111212201100 is a wasteful number, since it uses less digits than its factorization.

111212201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111212201100 its reverse (1102212111), we get a palindrome (112314413211).

The spelling of 111212201100 in words is "one hundred eleven billion, two hundred twelve million, two hundred one thousand, one hundred".