201111012220 has 12 divisors (see below), whose sum is σ = 422333125704. Its totient is φ = 80444404880.

The previous prime is 201111012139. The next prime is 201111012247. The reversal of 201111012220 is 22210111102.

It is a self number, because there is not a number n which added to its sum of digits gives 201111012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5027775286 + ... + 5027775325.

It is an arithmetic number, because the mean of its divisors is an integer number (35194427142).

Almost surely, 2^201111012220 is an apocalyptic number.

201111012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111012220 is an abundant number, since it is smaller than the sum of its proper divisors (221222113484).

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

201111012220 is a wasteful number, since it uses less digits than its factorization.

201111012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055550620 (or 10055550618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201111012220 its reverse (22210111102), we get a palindrome (223321123322).

The spelling of 201111012220 in words is "two hundred one billion, one hundred eleven million, twelve thousand, two hundred twenty".