21210100202200 has 144 divisors (see below), whose sum is σ = 61777330685280. Its totient is φ = 6712647056640.

The previous prime is 21210100202153. The next prime is 21210100202293. The reversal of 21210100202200 is 220200101212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83114752 + ... + 83369551.

It is an arithmetic number, because the mean of its divisors is an integer number (429009240870).

Almost surely, 2^{21210100202200} is an apocalyptic number.

21210100202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210100202200 is an abundant number, since it is smaller than the sum of its proper divisors (40567230483080).

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

21210100202200 is a wasteful number, since it uses less digits than its factorization.

21210100202200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166484346 (or 166484330 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21210100202200 its reverse (220200101212), we get a palindrome (21430300303412).

The spelling of 21210100202200 in words is "twenty-one trillion, two hundred ten billion, one hundred million, two hundred two thousand, two hundred".