201222022122 has 128 divisors (see below), whose sum is σ = 509352883200. Its totient is φ = 58322980800.

The previous prime is 201222022109. The next prime is 201222022153. The reversal of 201222022122 is 221220222102.

201222022122 is a `hidden beast` number, since 201 + 2 + 220 + 221 + 22 = 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 = 201222022095 and 201222022104.

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, 1788597 + ... + 1897767.

It is an arithmetic number, because the mean of its divisors is an integer number (3979319400).

Almost surely, 2^201222022122 is an apocalyptic number.

201222022122 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 201222022122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254676441600).

201222022122 is an abundant number, since it is smaller than the sum of its proper divisors (308130861078).

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

201222022122 is a wasteful number, since it uses less digits than its factorization.

201222022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109329 (or 109323 counting only the distinct ones).

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

Adding to 201222022122 its reverse (221220222102), we get a palindrome (422442244224).

The spelling of 201222022122 in words is "two hundred one billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-two".