211221102020200 has 48 divisors (see below), whose sum is σ = 491118563007360. Its totient is φ = 84483365400000.

The previous prime is 211221102020177. The next prime is 211221102020233. The reversal of 211221102020200 is 2020201122112.

It is a happy number.

It is a super-2 number, since 2×211221102020200² (a number of 29 digits) contains 22 as substring.

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, 28382776 + ... + 35043175.

It is an arithmetic number, because the mean of its divisors is an integer number (10231636729320).

Almost surely, 2^{211221102020200} is an apocalyptic number.

211221102020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221102020200 is an abundant number, since it is smaller than the sum of its proper divisors (279897460987160).

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

211221102020200 is a wasteful number, since it uses less digits than its factorization.

211221102020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63442618 (or 63442609 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211221102020200 its reverse (2020201122112), we get a palindrome (213241303142312).

The spelling of 211221102020200 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred two million, twenty thousand, two hundred".