201221113113 has 80 divisors (see below), whose sum is σ = 310983552000. Its totient is φ = 129594691584.

The previous prime is 201221113091. The next prime is 201221113123. The reversal of 201221113113 is 311311122102.

It is not a de Polignac number, because 201221113113 - 2⁹ = 201221112601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221113123) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 100659888 + ... + 100661886.

It is an arithmetic number, because the mean of its divisors is an integer number (3887294400).

Almost surely, 2^201221113113 is an apocalyptic number.

It is an amenable number.

201221113113 is a deficient number, since it is larger than the sum of its proper divisors (109762438887).

201221113113 is a wasteful number, since it uses less digits than its factorization.

201221113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201221113113 its reverse (311311122102), we get a palindrome (512532235215).

The spelling of 201221113113 in words is "two hundred one billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred thirteen".