21011102020200 has 96 divisors (see below), whose sum is σ = 65143129858560. Its totient is φ = 5602210982400.

The previous prime is 21011102020123. The next prime is 21011102020229. The reversal of 21011102020200 is 202020111012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2153580 + ... + 6830820.

It is an arithmetic number, because the mean of its divisors is an integer number (678574269360).

Almost surely, 2^{21011102020200} is an apocalyptic number.

21011102020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011102020200 is an abundant number, since it is smaller than the sum of its proper divisors (44132027838360).

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

21011102020200 is a wasteful number, since it uses less digits than its factorization.

21011102020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684747 (or 4684738 counting only the distinct ones).

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

Adding to 21011102020200 its reverse (202020111012), we get a palindrome (21213122131212).

The spelling of 21011102020200 in words is "twenty-one trillion, eleven billion, one hundred two million, twenty thousand, two hundred".