221201021010222 has 256 divisors, whose sum is σ = 565749610905600. Its totient is φ = 63358661376000.

The previous prime is 221201021010163. The next prime is 221201021010247. The reversal of 221201021010222 is 222010120102122.

It is a happy number.

221201021010222 is a `hidden beast` number, since 2 + 21 + 201 + 0 + 210 + 10 + 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 = 221201021010195 and 221201021010204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13746870397 + ... + 13746886487.

It is an arithmetic number, because the mean of its divisors is an integer number (2209959417600).

Almost surely, 2^{221201021010222} is an apocalyptic number.

221201021010222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221201021010222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282874805452800).

221201021010222 is an abundant number, since it is smaller than the sum of its proper divisors (344548589895378).

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

221201021010222 is a wasteful number, since it uses less digits than its factorization.

221201021010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18820 (or 18814 counting only the distinct ones).

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

Adding to 221201021010222 its reverse (222010120102122), we get a palindrome (443211141112344).

It can be divided in two parts, 2212010 and 21010222, that added together give a palindrome (23222232).

The spelling of 221201021010222 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-one million, ten thousand, two hundred twenty-two".