231121193 has 2 divisors, whose sum is σ = 231121194. Its totient is φ = 231121192.

The previous prime is 231121183. The next prime is 231121207. The reversal of 231121193 is 391121132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226592809 + 4528384 = 15053^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 231121193 - 2¹² = 231117097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560596 + 115560597.

It is an arithmetic number, because the mean of its divisors is an integer number (115560597).

Almost surely, 2^231121193 is an apocalyptic number.

It is an amenable number.

231121193 is a deficient number, since it is larger than the sum of its proper divisors (1).

231121193 is an equidigital number, since it uses as much as digits as its factorization.

231121193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 23.

The square root of 231121193 is about 15202.6705877619. The cubic root of 231121193 is about 613.6865289714.

The spelling of 231121193 in words is "two hundred thirty-one million, one hundred twenty-one thousand, one hundred ninety-three".