131211263125 has 10 divisors (see below), whose sum is σ = 163961595182. Its totient is φ = 104969010000.

The previous prime is 131211263063. The next prime is 131211263129. The reversal of 131211263125 is 521362112131.

It can be written as a sum of positive squares in 5 ways, for example, as 25649303716 + 105561959409 = 160154^2 + 324903^2 .

It is not a de Polignac number, because 131211263125 - 2²⁵ = 131177708693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211263093 and 131211263102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211263129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 104968386 + ... + 104969635.

Almost surely, 2^131211263125 is an apocalyptic number.

It is an amenable number.

131211263125 is a deficient number, since it is larger than the sum of its proper divisors (32750332057).

131211263125 is an frugal number, since it uses more digits than its factorization.

131211263125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209938041 (or 209938026 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

Adding to 131211263125 its reverse (521362112131), we get a palindrome (652573375256).

The spelling of 131211263125 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred sixty-three thousand, one hundred twenty-five".