111201002100 has 216 divisors, whose sum is σ = 360895179008. Its totient is φ = 28609459200.

The previous prime is 111201002057. The next prime is 111201002111. The reversal of 111201002100 is 1200102111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9396387 + ... + 9408213.

Almost surely, 2^111201002100 is an apocalyptic number.

111201002100 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 111201002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180447589504).

111201002100 is an abundant number, since it is smaller than the sum of its proper divisors (249694176908).

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

111201002100 is a wasteful number, since it uses less digits than its factorization.

111201002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12215 (or 12205 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111201002100 its reverse (1200102111), we get a palindrome (112401104211).

The spelling of 111201002100 in words is "one hundred eleven billion, two hundred one million, two thousand, one hundred".