221001021120222 has 192 divisors, whose sum is σ = 587001235392000. Its totient is φ = 58682175162624.

The previous prime is 221001021120221. The next prime is 221001021120247. The reversal of 221001021120222 is 222021120100122.

It is a happy number.

221001021120222 is a `hidden beast` number, since 2 + 210 + 0 + 1 + 0 + 211 + 20 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 221001021120195 and 221001021120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001021120221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 851121529 + ... + 851381147.

It is an arithmetic number, because the mean of its divisors is an integer number (3057298101000).

Almost surely, 2^{221001021120222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221001021120222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293500617696000).

221001021120222 is an abundant number, since it is smaller than the sum of its proper divisors (366000214271778).

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

221001021120222 is a wasteful number, since it uses less digits than its factorization.

221001021120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266415 (or 266412 counting only the distinct ones).

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

Adding to 221001021120222 its reverse (222021120100122), we get a palindrome (443022141220344).

The spelling of 221001021120222 in words is "two hundred twenty-one trillion, one billion, twenty-one million, one hundred twenty thousand, two hundred twenty-two".