2100111200 has 72 divisors (see below), whose sum is σ = 5593001400. Its totient is φ = 763673600.

The previous prime is 2100111193. The next prime is 2100111203. The reversal of 2100111200 is 21110012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100111203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110525 + ... + 128124.

It is an arithmetic number, because the mean of its divisors is an integer number (77680575).

Almost surely, 2^2100111200 is an apocalyptic number.

2100111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100111200 is an abundant number, since it is smaller than the sum of its proper divisors (3492890200).

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

2100111200 is a wasteful number, since it uses less digits than its factorization.

2100111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238680 (or 238667 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2100111200 is about 45826.9702249669. The cubic root of 2100111200 is about 1280.6017678271.

Adding to 2100111200 its reverse (21110012), we get a palindrome (2121221212).

The spelling of 2100111200 in words is "two billion, one hundred million, one hundred eleven thousand, two hundred".