201111101001220 has 24 divisors (see below), whose sum is σ = 424015914950208. Its totient is φ = 80123944620000.

The previous prime is 201111101001157. The next prime is 201111101001229. The reversal of 201111101001220 is 22100101111102.

It is a happy number.

201111101001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201111101001220.

It is not an unprimeable number, because it can be changed into a prime (201111101001229) 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, 20030981136 + ... + 20030991175.

It is an arithmetic number, because the mean of its divisors is an integer number (17667329789592).

Almost surely, 2^{201111101001220} is an apocalyptic number.

201111101001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111101001220 is an abundant number, since it is smaller than the sum of its proper divisors (222904813948988).

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

201111101001220 is a wasteful number, since it uses less digits than its factorization.

201111101001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40061972571 (or 40061972569 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201111101001220 its reverse (22100101111102), we get a palindrome (223211202112322).

The spelling of 201111101001220 in words is "two hundred one trillion, one hundred eleven billion, one hundred one million, one thousand, two hundred twenty".