2021323279 has 2 divisors, whose sum is σ = 2021323280. Its totient is φ = 2021323278.

The previous prime is 2021323277. The next prime is 2021323333. The reversal of 2021323279 is 9723231202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021323279 - 2¹ = 2021323277 is a prime.

Together with 2021323277, 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 2021323279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021323277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010661639 + 1010661640.

It is an arithmetic number, because the mean of its divisors is an integer number (1010661640).

Almost surely, 2^2021323279 is an apocalyptic number.

2021323279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021323279 is an equidigital number, since it uses as much as digits as its factorization.

2021323279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2021323279 is about 44959.1289840006. The cubic root of 2021323279 is about 1264.3828386142.

The spelling of 2021323279 in words is "two billion, twenty-one million, three hundred twenty-three thousand, two hundred seventy-nine".