2101100021200 has 60 divisors (see below), whose sum is σ = 5111790255040. Its totient is φ = 829801514880.

The previous prime is 2101100021197. The next prime is 2101100021219. The reversal of 2101100021200 is 21200011012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 33213654 + ... + 33276853.

Almost surely, 2^{2101100021200} is an apocalyptic number.

2101100021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101100021200 is an abundant number, since it is smaller than the sum of its proper divisors (3010690233840).

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

2101100021200 is a wasteful number, since it uses less digits than its factorization.

2101100021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66490604 (or 66490593 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2101100021200 its reverse (21200011012), we get a palindrome (2122300032212).

The spelling of 2101100021200 in words is "two trillion, one hundred one billion, one hundred million, twenty-one thousand, two hundred".