1231433123 has 2 divisors, whose sum is σ = 1231433124. Its totient is φ = 1231433122.

The previous prime is 1231433051. The next prime is 1231433129. The reversal of 1231433123 is 3213341321.

It is a strong prime.

It is an emirp because it is prime and its reverse (3213341321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231433123 - 2¹⁶ = 1231367587 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231433129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615716561 + 615716562.

It is an arithmetic number, because the mean of its divisors is an integer number (615716562).

Almost surely, 2^1231433123 is an apocalyptic number.

1231433123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231433123 is an equidigital number, since it uses as much as digits as its factorization.

1231433123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 1231433123 is about 35091.7814167363. The cubic root of 1231433123 is about 1071.8572347726.

Adding to 1231433123 its reverse (3213341321), we get a palindrome (4444774444).

The spelling of 1231433123 in words is "one billion, two hundred thirty-one million, four hundred thirty-three thousand, one hundred twenty-three".