221001020121222 has 48 divisors (see below), whose sum is σ = 522370261033920. Its totient is φ = 66969465908400.

The previous prime is 221001020121209. The next prime is 221001020121247. The reversal of 221001020121222 is 222121020100122.

It is a happy number.

221001020121222 is a `hidden beast` number, since 2 + 210 + 0 + 10 + 201 + 21 + 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 = 221001020121195 and 221001020121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20456029 + ... + 29333447.

It is an arithmetic number, because the mean of its divisors is an integer number (10882713771540).

Almost surely, 2^{221001020121222} is an apocalyptic number.

221001020121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221001020121222 is an abundant number, since it is smaller than the sum of its proper divisors (301369240912698).

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

221001020121222 is a wasteful number, since it uses less digits than its factorization.

221001020121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9003169 (or 9003166 counting only the distinct ones).

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

Adding to 221001020121222 its reverse (222121020100122), we get a palindrome (443122040221344).

The spelling of 221001020121222 in words is "two hundred twenty-one trillion, one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-two".