221001212222200 has 48 divisors (see below), whose sum is σ = 519125012466480. Its totient is φ = 87489139676160.

The previous prime is 221001212222171. The next prime is 221001212222237. The reversal of 221001212222200 is 2222212100122.

It is a congruent 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, 5695888132 + ... + 5695926931.

It is an arithmetic number, because the mean of its divisors is an integer number (10815104426385).

Almost surely, 2^{221001212222200} is an apocalyptic number.

221001212222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001212222200 is an abundant number, since it is smaller than the sum of its proper divisors (298123800244280).

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

221001212222200 is a wasteful number, since it uses less digits than its factorization.

221001212222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391815176 (or 11391815167 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221001212222200 its reverse (2222212100122), we get a palindrome (223223424322322).

The spelling of 221001212222200 in words is "two hundred twenty-one trillion, one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred".