21110221010200 has 96 divisors (see below), whose sum is σ = 56094732207360. Its totient is φ = 7237550160000.

The previous prime is 21110221010171. The next prime is 21110221010201. The reversal of 21110221010200 is 201012201112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110221010201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44917629 + ... + 45385171.

It is an arithmetic number, because the mean of its divisors is an integer number (584320127160).

Almost surely, 2^{21110221010200} is an apocalyptic number.

21110221010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110221010200 is an abundant number, since it is smaller than the sum of its proper divisors (34984511197160).

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

21110221010200 is a wasteful number, since it uses less digits than its factorization.

21110221010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499817 (or 499808 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21110221010200 its reverse (201012201112), we get a palindrome (21311233211312).

The spelling of 21110221010200 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, ten thousand, two hundred".