221022121200220 has 48 divisors (see below), whose sum is σ = 480153066775200. Its totient is φ = 85359989792000.

The previous prime is 221022121200211. The next prime is 221022121200253. The reversal of 221022121200220 is 22002121220122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326492451 + ... + 327168709.

It is an arithmetic number, because the mean of its divisors is an integer number (10003188891150).

Almost surely, 2^{221022121200220} is an apocalyptic number.

221022121200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022121200220 is an abundant number, since it is smaller than the sum of its proper divisors (259130945574980).

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

221022121200220 is a wasteful number, since it uses less digits than its factorization.

221022121200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239798 (or 1239796 counting only the distinct ones).

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

Adding to 221022121200220 its reverse (22002121220122), we get a palindrome (243024242420342).

The spelling of 221022121200220 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twenty-one million, two hundred thousand, two hundred twenty".