21200102200 has 48 divisors (see below), whose sum is σ = 49300895880. Its totient is φ = 8478207360.

The previous prime is 21200102191. The next prime is 21200102227. The reversal of 21200102200 is 220100212.

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, 1277154 + ... + 1293646.

Almost surely, 2^21200102200 is an apocalyptic number.

21200102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200102200 is an abundant number, since it is smaller than the sum of its proper divisors (28100793680).

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

21200102200 is a wasteful number, since it uses less digits than its factorization.

21200102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22936 (or 22927 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21200102200 its reverse (220100212), we get a palindrome (21420202412).

The spelling of 21200102200 in words is "twenty-one billion, two hundred million, one hundred two thousand, two hundred".