201122222220220 has 96 divisors (see below), whose sum is σ = 488845872506880. Its totient is φ = 68077408089600.

The previous prime is 201122222220209. The next prime is 201122222220251. The reversal of 201122222220220 is 22022222221102.

It is a junction number, because it is equal to n+sod(n) for n = 201122222220191 and 201122222220200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127367520 + ... + 128936920.

It is an arithmetic number, because the mean of its divisors is an integer number (5092144505280).

Almost surely, 2^{201122222220220} is an apocalyptic number.

201122222220220 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 201122222220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244422936253440).

201122222220220 is an abundant number, since it is smaller than the sum of its proper divisors (287723650286660).

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

201122222220220 is a wasteful number, since it uses less digits than its factorization.

201122222220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581083 (or 1581081 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 201122222220220 its reverse (22022222221102), we get a palindrome (223144444441322).

The spelling of 201122222220220 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty".