2100021012200 has 96 divisors (see below), whose sum is σ = 5142450058560. Its totient is φ = 795976896000.

The previous prime is 2100021012097. The next prime is 2100021012233. The reversal of 2100021012200 is 22101200012.

It is a happy 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, 1641101 + ... + 2625500.

It is an arithmetic number, because the mean of its divisors is an integer number (53567188110).

Almost surely, 2^{2100021012200} is an apocalyptic number.

2100021012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100021012200 is an abundant number, since it is smaller than the sum of its proper divisors (3042429046360).

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

2100021012200 is a wasteful number, since it uses less digits than its factorization.

2100021012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266747 (or 4266738 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2100021012200 its reverse (22101200012), we get a palindrome (2122122212212).

The spelling of 2100021012200 in words is "two trillion, one hundred billion, twenty-one million, twelve thousand, two hundred".