131233311161 has 2 divisors, whose sum is σ = 131233311162. Its totient is φ = 131233311160.

The previous prime is 131233311149. The next prime is 131233311211. The reversal of 131233311161 is 161113332131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126341148025 + 4892163136 = 355445^2 + 69944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131233311161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131233311161.

It is not a weakly prime, because it can be changed into another prime (131233301161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65616655580 + 65616655581.

It is an arithmetic number, because the mean of its divisors is an integer number (65616655581).

Almost surely, 2^131233311161 is an apocalyptic number.

It is an amenable number.

131233311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

131233311161 is an equidigital number, since it uses as much as digits as its factorization.

131233311161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

Adding to 131233311161 its reverse (161113332131), we get a palindrome (292346643292).

The spelling of 131233311161 in words is "one hundred thirty-one billion, two hundred thirty-three million, three hundred eleven thousand, one hundred sixty-one".