231201021111233 has 2 divisors, whose sum is σ = 231201021111234. Its totient is φ = 231201021111232.

The previous prime is 231201021111199. The next prime is 231201021111323. The reversal of 231201021111233 is 332111120102132.

It is a happy number.

231201021111233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (231201021111323) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143488487054224 + 87712534057009 = 11978668^2 + 9365497^2 .

It is a cyclic number.

It is not a de Polignac number, because 231201021111233 - 2¹² = 231201021107137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231201021111199 and 231201021111208.

It is not a weakly prime, because it can be changed into another prime (231201021111833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115600510555616 + 115600510555617.

It is an arithmetic number, because the mean of its divisors is an integer number (115600510555617).

Almost surely, 2^{231201021111233} is an apocalyptic number.

It is an amenable number.

231201021111233 is a deficient number, since it is larger than the sum of its proper divisors (1).

231201021111233 is an equidigital number, since it uses as much as digits as its factorization.

231201021111233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231201021111233 its reverse (332111120102132), we get a palindrome (563312141213365).

The spelling of 231201021111233 in words is "two hundred thirty-one trillion, two hundred one billion, twenty-one million, one hundred eleven thousand, two hundred thirty-three".