131311123 has 2 divisors, whose sum is σ = 131311124.
Its totient is φ = 131311122.
The previous prime is 131311099. The next prime is 131311127. The reversal of 131311123 is 321113131.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-131311123 is a prime.
It is a super-2 number, since 2×1313111232 = 34485222047042258, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 131311097 and 131311106.
It is not a weakly prime, because it can be changed into another prime (131311127) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655561 + 65655562.
It is an arithmetic number, because the mean of its divisors is an integer number (65655562).
Almost surely, 2131311123 is an apocalyptic number.
131311123 is a deficient number, since it is larger than the sum of its proper divisors (1).
131311123 is an equidigital number, since it uses as much as digits as its factorization.
131311123 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 54, while the sum is 16.
The square root of 131311123 is about 11459.1065533051.
The cubic root of 131311123 is about 508.2770553003.
Adding to 131311123 its reverse (321113131), we get a palindrome (452424254).
The spelling of 131311123 in words is "one hundred thirty-one million, three hundred eleven thousand, one hundred twenty-three".