221021220012200 has 48 divisors (see below), whose sum is σ = 536216698997280. Its totient is φ = 84564640698560.

The previous prime is 221021220012169. The next prime is 221021220012209. The reversal of 221021220012200 is 2210022120122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221021220012209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24024041054 + ... + 24024050253.

It is an arithmetic number, because the mean of its divisors is an integer number (11171181229110).

Almost surely, 2^{221021220012200} is an apocalyptic number.

221021220012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021220012200 is an abundant number, since it is smaller than the sum of its proper divisors (315195478985080).

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

221021220012200 is a wasteful number, since it uses less digits than its factorization.

221021220012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48048091346 (or 48048091337 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221021220012200 its reverse (2210022120122), we get a palindrome (223231242132322).

The spelling of 221021220012200 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty million, twelve thousand, two hundred".