221001020022222 has 256 divisors, whose sum is σ = 548419835658240. Its totient is φ = 65409693350400.

The previous prime is 221001020022197. The next prime is 221001020022227. The reversal of 221001020022222 is 222220020100122.

221001020022222 is a `hidden beast` number, since 2 + 210 + 0 + 10 + 200 + 22 + 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 = 221001020022195 and 221001020022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001020022227) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1771900822 + ... + 1772025542.

It is an arithmetic number, because the mean of its divisors is an integer number (2142264983040).

Almost surely, 2^{221001020022222} is an apocalyptic number.

221001020022222 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 221001020022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274209917829120).

221001020022222 is an abundant number, since it is smaller than the sum of its proper divisors (327418815636018).

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

221001020022222 is a wasteful number, since it uses less digits than its factorization.

221001020022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125236 (or 125230 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221001020022222 its reverse (222220020100122), we get a palindrome (443221040122344).

The spelling of 221001020022222 in words is "two hundred twenty-one trillion, one billion, twenty million, twenty-two thousand, two hundred twenty-two".