21112020200 has 48 divisors (see below), whose sum is σ = 49544239680. Its totient is φ = 8365876160.

The previous prime is 21112020191. The next prime is 21112020233. The reversal of 21112020200 is 202021112.

It is a happy 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, 471872 + ... + 514671.

It is an arithmetic number, because the mean of its divisors is an integer number (1032171660).

Almost surely, 2^21112020200 is an apocalyptic number.

21112020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112020200 is an abundant number, since it is smaller than the sum of its proper divisors (28432219480).

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

21112020200 is a wasteful number, since it uses less digits than its factorization.

21112020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986666 (or 986657 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21112020200 its reverse (202021112), we get a palindrome (21314041312).

The spelling of 21112020200 in words is "twenty-one billion, one hundred twelve million, twenty thousand, two hundred".