201121113 has 16 divisors (see below), whose sum is σ = 275740416. Its totient is φ = 130316160.

The previous prime is 201121111. The next prime is 201121117. The reversal of 201121113 is 311121102.

It is not a de Polignac number, because 201121113 - 2¹ = 201121111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31120 + ... + 37022.

It is an arithmetic number, because the mean of its divisors is an integer number (17233776).

Almost surely, 2^201121113 is an apocalyptic number.

It is an amenable number.

201121113 is a deficient number, since it is larger than the sum of its proper divisors (74619303).

201121113 is a wasteful number, since it uses less digits than its factorization.

201121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 201121113 is about 14181.7175617060. The cubic root of 201121113 is about 585.8942303095.

Adding to 201121113 its reverse (311121102), we get a palindrome (512242215).

The spelling of 201121113 in words is "two hundred one million, one hundred twenty-one thousand, one hundred thirteen".