1312331123 has 2 divisors, whose sum is σ = 1312331124. Its totient is φ = 1312331122.

The previous prime is 1312331101. The next prime is 1312331131. The reversal of 1312331123 is 3211332131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312331123 - 2⁸ = 1312330867 is a prime.

It is a super-3 number, since 3×1312331123³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1312331095 and 1312331104.

It is not a weakly prime, because it can be changed into another prime (1312331143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656165561 + 656165562.

It is an arithmetic number, because the mean of its divisors is an integer number (656165562).

Almost surely, 2^1312331123 is an apocalyptic number.

1312331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312331123 is an equidigital number, since it uses as much as digits as its factorization.

1312331123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 20.

The square root of 1312331123 is about 36226.1110664670. Note that the first 3 decimals coincide. The cubic root of 1312331123 is about 1094.8328242242.

Adding to 1312331123 its reverse (3211332131), we get a palindrome (4523663254).

The spelling of 1312331123 in words is "one billion, three hundred twelve million, three hundred thirty-one thousand, one hundred twenty-three".