201211022122220 has 192 divisors, whose sum is σ = 472945317747840. Its totient is φ = 71270328729600.

The previous prime is 201211022122199. The next prime is 201211022122247. The reversal of 201211022122220 is 22221220112102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201211022122192 and 201211022122201.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20596885496 + ... + 20596895264.

It is an arithmetic number, because the mean of its divisors is an integer number (2463256863270).

Almost surely, 2^{201211022122220} is an apocalyptic number.

201211022122220 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 201211022122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236472658873920).

201211022122220 is an abundant number, since it is smaller than the sum of its proper divisors (271734295625620).

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

201211022122220 is a wasteful number, since it uses less digits than its factorization.

201211022122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204 (or 13202 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201211022122220 its reverse (22221220112102), we get a palindrome (223432242234322).

The spelling of 201211022122220 in words is "two hundred one trillion, two hundred eleven billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty".