113121121 has 2 divisors, whose sum is σ = 113121122. Its totient is φ = 113121120.

The previous prime is 113121103. The next prime is 113121157. The reversal of 113121121 is 121121311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111830625 + 1290496 = 10575^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 113121121 - 2²³ = 104732513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56560560 + 56560561.

It is an arithmetic number, because the mean of its divisors is an integer number (56560561).

Almost surely, 2^113121121 is an apocalyptic number.

It is an amenable number.

113121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

113121121 is an equidigital number, since it uses as much as digits as its factorization.

113121121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 13.

The square root of 113121121 is about 10635.8413395462. The cubic root of 113121121 is about 483.6314855888.

Adding to 113121121 its reverse (121121311), we get a palindrome (234242432).

The spelling of 113121121 in words is "one hundred thirteen million, one hundred twenty-one thousand, one hundred twenty-one".