113205016121 has 4 divisors (see below), whose sum is σ = 113207211492. Its totient is φ = 113202820752.

The previous prime is 113205016109. The next prime is 113205016151. The reversal of 113205016121 is 121610502311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3518862400 + 109686153721 = 59320^2 + 331189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113205016121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113205016151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018430 + ... + 1124103.

It is an arithmetic number, because the mean of its divisors is an integer number (28301802873).

Almost surely, 2^113205016121 is an apocalyptic number.

It is an amenable number.

113205016121 is a deficient number, since it is larger than the sum of its proper divisors (2195371).

113205016121 is an equidigital number, since it uses as much as digits as its factorization.

113205016121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195370.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 113205016121 its reverse (121610502311), we get a palindrome (234815518432).

The spelling of 113205016121 in words is "one hundred thirteen billion, two hundred five million, sixteen thousand, one hundred twenty-one".