320021311279 has 2 divisors, whose sum is σ = 320021311280. Its totient is φ = 320021311278.

The previous prime is 320021311277. The next prime is 320021311301. The reversal of 320021311279 is 972113120023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320021311279 - 2¹ = 320021311277 is a prime.

It is a super-2 number, since 2×320021311279² (a number of 24 digits) contains 22 as substring.

Together with 320021311277, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 320021311279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320021311277) 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, 160010655639 + 160010655640.

It is an arithmetic number, because the mean of its divisors is an integer number (160010655640).

Almost surely, 2^320021311279 is an apocalyptic number.

320021311279 is a deficient number, since it is larger than the sum of its proper divisors (1).

320021311279 is an equidigital number, since it uses as much as digits as its factorization.

320021311279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

It can be divided in two parts, 32002 and 1311279, that added together give a square (1343281 = 1159²).

The spelling of 320021311279 in words is "three hundred twenty billion, twenty-one million, three hundred eleven thousand, two hundred seventy-nine".