230781121 has 2 divisors, whose sum is σ = 230781122. Its totient is φ = 230781120.

The previous prime is 230781119. The next prime is 230781127. The reversal of 230781121 is 121187032.

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., 119246400 + 111534721 = 10920^2 + 10561^2 .

It is a cyclic number.

It is not a de Polignac number, because 230781121 - 2¹ = 230781119 is a prime.

Together with 230781119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (230781127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115390560 + 115390561.

It is an arithmetic number, because the mean of its divisors is an integer number (115390561).

Almost surely, 2^230781121 is an apocalyptic number.

It is an amenable number.

230781121 is a deficient number, since it is larger than the sum of its proper divisors (1).

230781121 is an equidigital number, since it uses as much as digits as its factorization.

230781121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 230781121 is about 15191.4818566195. The cubic root of 230781121 is about 613.3853881924.

The spelling of 230781121 in words is "two hundred thirty million, seven hundred eighty-one thousand, one hundred twenty-one".