311220120891341 has 2 divisors, whose sum is σ = 311220120891342. Its totient is φ = 311220120891340.

The previous prime is 311220120891289. The next prime is 311220120891359. The reversal of 311220120891341 is 143198021022113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257370501358441 + 53849619532900 = 16042771^2 + 7338230^2 .

It is an emirp because it is prime and its reverse (143198021022113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311220120891341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311220120891295 and 311220120891304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311220120891041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155610060445670 + 155610060445671.

It is an arithmetic number, because the mean of its divisors is an integer number (155610060445671).

Almost surely, 2^{311220120891341} is an apocalyptic number.

It is an amenable number.

311220120891341 is a deficient number, since it is larger than the sum of its proper divisors (1).

311220120891341 is an equidigital number, since it uses as much as digits as its factorization.

311220120891341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 311220120891341 in words is "three hundred eleven trillion, two hundred twenty billion, one hundred twenty million, eight hundred ninety-one thousand, three hundred forty-one".