221312112200220 has 48 divisors (see below), whose sum is σ = 628401715780608. Its totient is φ = 58185344051520.

The previous prime is 221312112200219. The next prime is 221312112200227. The reversal of 221312112200220 is 22002211213122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312112200227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25975595764 + ... + 25975604283.

It is an arithmetic number, because the mean of its divisors is an integer number (13091702412096).

Almost surely, 2^{221312112200220} is an apocalyptic number.

221312112200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221312112200220 is an abundant number, since it is smaller than the sum of its proper divisors (407089603580388).

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

221312112200220 is a wasteful number, since it uses less digits than its factorization.

221312112200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51951200130 (or 51951200128 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221312112200220 its reverse (22002211213122), we get a palindrome (243314323413342).

The spelling of 221312112200220 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred twelve million, two hundred thousand, two hundred twenty".