12131116117 has 2 divisors, whose sum is σ = 12131116118. Its totient is φ = 12131116116.

The previous prime is 12131116103. The next prime is 12131116133. The reversal of 12131116117 is 71161113121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11950643761 + 180472356 = 109319^2 + 13434^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131116117 - 2¹⁹ = 12130591829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131116091 and 12131116100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131116157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065558058 + 6065558059.

It is an arithmetic number, because the mean of its divisors is an integer number (6065558059).

Almost surely, 2^12131116117 is an apocalyptic number.

It is an amenable number.

12131116117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131116117 is an equidigital number, since it uses as much as digits as its factorization.

12131116117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 25.

Adding to 12131116117 its reverse (71161113121), we get a palindrome (83292229238).

The spelling of 12131116117 in words is "twelve billion, one hundred thirty-one million, one hundred sixteen thousand, one hundred seventeen".