311111203369 has 2 divisors, whose sum is σ = 311111203370. Its totient is φ = 311111203368.

The previous prime is 311111203327. The next prime is 311111203379. The reversal of 311111203369 is 963302111113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251565442969 + 59545760400 = 501563^2 + 244020^2 .

It is a cyclic number.

It is not a de Polignac number, because 311111203369 - 2¹³ = 311111195177 is a prime.

It is a super-2 number, since 2×311111203369² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311111203369.

It is not a weakly prime, because it can be changed into another prime (311111203379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155555601684 + 155555601685.

It is an arithmetic number, because the mean of its divisors is an integer number (155555601685).

Almost surely, 2^311111203369 is an apocalyptic number.

It is an amenable number.

311111203369 is a deficient number, since it is larger than the sum of its proper divisors (1).

311111203369 is an equidigital number, since it uses as much as digits as its factorization.

311111203369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 311111203369 in words is "three hundred eleven billion, one hundred eleven million, two hundred three thousand, three hundred sixty-nine".