221021222112200 has 48 divisors (see below), whose sum is σ = 513884130344880. Its totient is φ = 88406804727360.

The previous prime is 221021222112167. The next prime is 221021222112227. The reversal of 221021222112200 is 2211222120122.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 25979 + ... + 21024821.

It is an arithmetic number, because the mean of its divisors is an integer number (10705919382185).

Almost surely, 2^{221021222112200} is an apocalyptic number.

221021222112200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021222112200 is an abundant number, since it is smaller than the sum of its proper divisors (292862908232680).

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

221021222112200 is a wasteful number, since it uses less digits than its factorization.

221021222112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21051486 (or 21051477 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221021222112200 its reverse (2211222120122), we get a palindrome (223232444232322).

The spelling of 221021222112200 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred".