311421206869 has 2 divisors, whose sum is σ = 311421206870. Its totient is φ = 311421206868.

The previous prime is 311421206797. The next prime is 311421206897. The reversal of 311421206869 is 968602124113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296956333969 + 14464872900 = 544937^2 + 120270^2 .

It is a cyclic number.

It is not a de Polignac number, because 311421206869 - 2¹³ = 311421198677 is a prime.

It is a super-2 number, since 2×311421206869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311421206069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155710603434 + 155710603435.

It is an arithmetic number, because the mean of its divisors is an integer number (155710603435).

Almost surely, 2^311421206869 is an apocalyptic number.

It is an amenable number.

311421206869 is a deficient number, since it is larger than the sum of its proper divisors (1).

311421206869 is an equidigital number, since it uses as much as digits as its factorization.

311421206869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 311421206869 in words is "three hundred eleven billion, four hundred twenty-one million, two hundred six thousand, eight hundred sixty-nine".