201122001122220 has 72 divisors (see below), whose sum is σ = 626558450363664. Its totient is φ = 52183005694848.

The previous prime is 201122001122219. The next prime is 201122001122311. The reversal of 201122001122220 is 22221100221102.

It is a happy number.

201122001122220 is a `hidden beast` number, since 20 + 112 + 200 + 112 + 2 + 220 = 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 = 201122001122193 and 201122001122202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15099242674 + ... + 15099255993.

Almost surely, 2^{201122001122220} is an apocalyptic number.

201122001122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201122001122220 is an abundant number, since it is smaller than the sum of its proper divisors (425436449241444).

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

201122001122220 is a wasteful number, since it uses less digits than its factorization.

201122001122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30198498719 (or 30198498714 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201122001122220 its reverse (22221100221102), we get a palindrome (223343101343322).

The spelling of 201122001122220 in words is "two hundred one trillion, one hundred twenty-two billion, one million, one hundred twenty-two thousand, two hundred twenty".