201112201220 has 24 divisors (see below), whose sum is σ = 482669283264. Its totient is φ = 68952754656.

The previous prime is 201112201207. The next prime is 201112201223. The reversal of 201112201220 is 22102211102.

It is a super-2 number, since 2×201112201220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 201112201195 and 201112201204.

It is not an unprimeable number, because it can be changed into a prime (201112201223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718257722 + ... + 718258001.

It is an arithmetic number, because the mean of its divisors is an integer number (20111220136).

Almost surely, 2^201112201220 is an apocalyptic number.

201112201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201112201220 is an abundant number, since it is smaller than the sum of its proper divisors (281557082044).

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

201112201220 is a wasteful number, since it uses less digits than its factorization.

201112201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436515739 (or 1436515737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201112201220 its reverse (22102211102), we get a palindrome (223214412322).

The spelling of 201112201220 in words is "two hundred one billion, one hundred twelve million, two hundred one thousand, two hundred twenty".