1231231303 has 2 divisors, whose sum is σ = 1231231304. Its totient is φ = 1231231302.

The previous prime is 1231231301. The next prime is 1231231321. The reversal of 1231231303 is 3031321321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231231303 - 2¹ = 1231231301 is a prime.

It is a super-3 number, since 3×1231231303³ (a number of 28 digits) contains 333 as substring.

Together with 1231231301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231231301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615615651 + 615615652.

It is an arithmetic number, because the mean of its divisors is an integer number (615615652).

Almost surely, 2^1231231303 is an apocalyptic number.

1231231303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231231303 is an equidigital number, since it uses as much as digits as its factorization.

1231231303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231231303 is about 35088.9056968153. The cubic root of 1231231303 is about 1071.7986758892.

Adding to 1231231303 its reverse (3031321321), we get a palindrome (4262552624).

The spelling of 1231231303 in words is "one billion, two hundred thirty-one million, two hundred thirty-one thousand, three hundred three".