221202022021110 has 192 divisors, whose sum is σ = 620057263775040. Its totient is φ = 54388955381760.

The previous prime is 221202022021067. The next prime is 221202022021129. The reversal of 221202022021110 is 11120220202122.

It is a happy number.

221202022021110 is a `hidden beast` number, since 2 + 21 + 202 + 0 + 220 + 211 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5255556946 + ... + 5255599034.

It is an arithmetic number, because the mean of its divisors is an integer number (3229464915495).

Almost surely, 2^{221202022021110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221202022021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310028631887520).

221202022021110 is an abundant number, since it is smaller than the sum of its proper divisors (398855241753930).

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

221202022021110 is a wasteful number, since it uses less digits than its factorization.

221202022021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47023 (or 47020 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221202022021110 its reverse (11120220202122), we get a palindrome (232322242223232).

The spelling of 221202022021110 in words is "two hundred twenty-one trillion, two hundred two billion, twenty-two million, twenty-one thousand, one hundred ten".