231120133 has 2 divisors, whose sum is σ = 231120134. Its totient is φ = 231120132.

The previous prime is 231120119. The next prime is 231120137. The reversal of 231120133 is 331021132.

231120133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167391844 + 63728289 = 12938^2 + 7983^2 .

It is a cyclic number.

It is not a de Polignac number, because 231120133 - 2⁵ = 231120101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231120137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560066 + 115560067.

It is an arithmetic number, because the mean of its divisors is an integer number (115560067).

Almost surely, 2^231120133 is an apocalyptic number.

It is an amenable number.

231120133 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120133 is an equidigital number, since it uses as much as digits as its factorization.

231120133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231120133 is about 15202.6357254260. The cubic root of 231120133 is about 613.6855907786.

Adding to 231120133 its reverse (331021132), we get a palindrome (562141265).

Subtracting 231120133 from its reverse (331021132), we obtain a palindrome (99900999).

The spelling of 231120133 in words is "two hundred thirty-one million, one hundred twenty thousand, one hundred thirty-three".