201111021222120 has 128 divisors (see below), whose sum is σ = 699516595641600. Its totient is φ = 51297883667712.

The previous prime is 201111021222077. The next prime is 201111021222131. The reversal of 201111021222120 is 21222120111102.

201111021222120 is a `hidden beast` number, since 201 + 1 + 1 + 10 + 212 + 221 + 20 = 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 = 201111021222093 and 201111021222102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4048103607 + ... + 4048153286.

It is an arithmetic number, because the mean of its divisors is an integer number (5464973403450).

Almost surely, 2^{201111021222120} is an apocalyptic number.

201111021222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111021222120 is an abundant number, since it is smaller than the sum of its proper divisors (498405574419480).

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

201111021222120 is a wasteful number, since it uses less digits than its factorization.

201111021222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8096256936 (or 8096256926 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201111021222120 its reverse (21222120111102), we get a palindrome (222333141333222).

The spelling of 201111021222120 in words is "two hundred one trillion, one hundred eleven billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty".