131231110123 has 2 divisors, whose sum is σ = 131231110124. Its totient is φ = 131231110122.

The previous prime is 131231110121. The next prime is 131231110133. The reversal of 131231110123 is 321011132131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131231110123 - 2¹ = 131231110121 is a prime.

It is a super-2 number, since 2×131231110123² (a number of 23 digits) contains 22 as substring.

Together with 131231110121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 131231110123.

It is not a weakly prime, because it can be changed into another prime (131231110121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65615555061 + 65615555062.

It is an arithmetic number, because the mean of its divisors is an integer number (65615555062).

Almost surely, 2^131231110123 is an apocalyptic number.

131231110123 is a deficient number, since it is larger than the sum of its proper divisors (1).

131231110123 is an equidigital number, since it uses as much as digits as its factorization.

131231110123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 131231110123 its reverse (321011132131), we get a palindrome (452242242254).

The spelling of 131231110123 in words is "one hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, one hundred twenty-three".