125323666131 has 4 divisors (see below), whose sum is σ = 167098221512. Its totient is φ = 83549110752.

The previous prime is 125323666123. The next prime is 125323666133. The reversal of 125323666131 is 131666323521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125323666131 - 2³ = 125323666123 is a prime.

It is a super-2 number, since 2×125323666131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125323666131.

It is not an unprimeable number, because it can be changed into a prime (125323666133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20887277686 + ... + 20887277691.

It is an arithmetic number, because the mean of its divisors is an integer number (41774555378).

Almost surely, 2^125323666131 is an apocalyptic number.

125323666131 is a deficient number, since it is larger than the sum of its proper divisors (41774555381).

125323666131 is an equidigital number, since it uses as much as digits as its factorization.

125323666131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41774555380.

The product of its digits is 116640, while the sum is 39.

Adding to 125323666131 its reverse (131666323521), we get a palindrome (256989989652).

The spelling of 125323666131 in words is "one hundred twenty-five billion, three hundred twenty-three million, six hundred sixty-six thousand, one hundred thirty-one".