2100121222200 has 96 divisors (see below), whose sum is σ = 6510953949360. Its totient is φ = 559982592000.

The previous prime is 2100121222163. The next prime is 2100121222229. The reversal of 2100121222200 is 22221210012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2100121222200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6871032 + ... + 7170168.

Almost surely, 2^{2100121222200} is an apocalyptic number.

2100121222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100121222200 is an abundant number, since it is smaller than the sum of its proper divisors (4410832727160).

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

2100121222200 is a wasteful number, since it uses less digits than its factorization.

2100121222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310857 (or 310848 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2100121222200 its reverse (22221210012), we get a palindrome (2122342432212).

The spelling of 2100121222200 in words is "two trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred".