1231322233 has 2 divisors, whose sum is σ = 1231322234. Its totient is φ = 1231322232.

The previous prime is 1231322231. The next prime is 1231322249. The reversal of 1231322233 is 3322231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160560489 + 70761744 = 34067^2 + 8412^2 .

It is an emirp because it is prime and its reverse (3322231321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231322233 - 2¹ = 1231322231 is a prime.

Together with 1231322231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1231322231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615661116 + 615661117.

It is an arithmetic number, because the mean of its divisors is an integer number (615661117).

Almost surely, 2^1231322233 is an apocalyptic number.

It is an amenable number.

1231322233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231322233 is an equidigital number, since it uses as much as digits as its factorization.

1231322233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 22.

The square root of 1231322233 is about 35090.2013815823. The cubic root of 1231322233 is about 1071.8250603858.

Adding to 1231322233 its reverse (3322231321), we get a palindrome (4553553554).

The spelling of 1231322233 in words is "one billion, two hundred thirty-one million, three hundred twenty-two thousand, two hundred thirty-three".