113121110203 has 2 divisors, whose sum is σ = 113121110204. Its totient is φ = 113121110202.

The previous prime is 113121110171. The next prime is 113121110237. The reversal of 113121110203 is 302011121311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113121110203 - 2⁵ = 113121110171 is a prime.

It is not a weakly prime, because it can be changed into another prime (113121110273) 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 as a sum of consecutive naturals, namely, 56560555101 + 56560555102.

It is an arithmetic number, because the mean of its divisors is an integer number (56560555102).

Almost surely, 2^113121110203 is an apocalyptic number.

113121110203 is a deficient number, since it is larger than the sum of its proper divisors (1).

113121110203 is an equidigital number, since it uses as much as digits as its factorization.

113121110203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 113121110203 its reverse (302011121311), we get a palindrome (415132231514).

The spelling of 113121110203 in words is "one hundred thirteen billion, one hundred twenty-one million, one hundred ten thousand, two hundred three".