2311230312161 has 2 divisors, whose sum is σ = 2311230312162. Its totient is φ = 2311230312160.

The previous prime is 2311230312133. The next prime is 2311230312253. The reversal of 2311230312161 is 1612130321132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1169685510400 + 1141544801761 = 1081520^2 + 1068431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311230312161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2311230312161.

It is not a weakly prime, because it can be changed into another prime (2311230312361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155615156080 + 1155615156081.

It is an arithmetic number, because the mean of its divisors is an integer number (1155615156081).

Almost surely, 2^{2311230312161} is an apocalyptic number.

It is an amenable number.

2311230312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311230312161 is an equidigital number, since it uses as much as digits as its factorization.

2311230312161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 2311230312161 its reverse (1612130321132), we get a palindrome (3923360633293).

The spelling of 2311230312161 in words is "two trillion, three hundred eleven billion, two hundred thirty million, three hundred twelve thousand, one hundred sixty-one".