21200120110200 has 48 divisors (see below), whose sum is σ = 65720372343480. Its totient is φ = 5653365362560.

The previous prime is 21200120110199. The next prime is 21200120110217. The reversal of 21200120110200 is 201102100212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 17666766159 + ... + 17666767358.

Almost surely, 2^{21200120110200} is an apocalyptic number.

21200120110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200120110200 is an abundant number, since it is smaller than the sum of its proper divisors (44520252233280).

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

21200120110200 is a wasteful number, since it uses less digits than its factorization.

21200120110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35333533536 (or 35333533527 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200120110200 its reverse (201102100212), we get a palindrome (21401222210412).

The spelling of 21200120110200 in words is "twenty-one trillion, two hundred billion, one hundred twenty million, one hundred ten thousand, two hundred".