221001022210220 has 384 divisors, whose sum is σ = 547222923878400. Its totient is φ = 73412698963968.

The previous prime is 221001022210141. The next prime is 221001022210307. The reversal of 221001022210220 is 22012220100122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 139608983549 + ... + 139608985131.

It is an arithmetic number, because the mean of its divisors is an integer number (1425059697600).

Almost surely, 2^{221001022210220} is an apocalyptic number.

221001022210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221001022210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273611461939200).

221001022210220 is an abundant number, since it is smaller than the sum of its proper divisors (326221901668180).

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

221001022210220 is a wasteful number, since it uses less digits than its factorization.

221001022210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221001022210220 its reverse (22012220100122), we get a palindrome (243013242310342).

The spelling of 221001022210220 in words is "two hundred twenty-one trillion, one billion, twenty-two million, two hundred ten thousand, two hundred twenty".