1231333013 has 2 divisors, whose sum is σ = 1231333014. Its totient is φ = 1231333012.

The previous prime is 1231332983. The next prime is 1231333043. The reversal of 1231333013 is 3103331321.

It is a balanced prime because it is at equal distance from previous prime (1231332983) and next prime (1231333043).

It can be written as a sum of positive squares in only one way, i.e., 853691524 + 377641489 = 29218^2 + 19433^2 .

It is an emirp because it is prime and its reverse (3103331321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231333013 - 2⁸ = 1231332757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231333043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615666506 + 615666507.

It is an arithmetic number, because the mean of its divisors is an integer number (615666507).

Almost surely, 2^1231333013 is an apocalyptic number.

It is an amenable number.

1231333013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231333013 is an equidigital number, since it uses as much as digits as its factorization.

1231333013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1231333013 is about 35090.3549853802. The cubic root of 1231333013 is about 1071.8281882539.

Adding to 1231333013 its reverse (3103331321), we get a palindrome (4334664334).

The spelling of 1231333013 in words is "one billion, two hundred thirty-one million, three hundred thirty-three thousand, thirteen".