2100121101200 has 60 divisors (see below), whose sum is σ = 5049019626288. Its totient is φ = 839469264000.

The previous prime is 2100121101181. The next prime is 2100121101229. The reversal of 2100121101200 is 21011210012.

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, 1228802 + ... + 2389601.

Almost surely, 2^{2100121101200} is an apocalyptic number.

2100121101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100121101200 is an abundant number, since it is smaller than the sum of its proper divisors (2948898525088).

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

2100121101200 is a wasteful number, since it uses less digits than its factorization.

2100121101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619872 (or 3619861 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2100121101200 its reverse (21011210012), we get a palindrome (2121132311212).

The spelling of 2100121101200 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred one thousand, two hundred".