2021340331 has 2 divisors, whose sum is σ = 2021340332. Its totient is φ = 2021340330.

The previous prime is 2021340323. The next prime is 2021340359. The reversal of 2021340331 is 1330431202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021340331 - 2³ = 2021340323 is a prime.

It is a super-2 number, since 2×2021340331² = 8171633467454379122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021340299 and 2021340308.

It is not a weakly prime, because it can be changed into another prime (2021340361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010670165 + 1010670166.

It is an arithmetic number, because the mean of its divisors is an integer number (1010670166).

Almost surely, 2^2021340331 is an apocalyptic number.

2021340331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021340331 is an equidigital number, since it uses as much as digits as its factorization.

2021340331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2021340331 is about 44959.3186225058. The cubic root of 2021340331 is about 1264.3863940731.

Adding to 2021340331 its reverse (1330431202), we get a palindrome (3351771533).

The spelling of 2021340331 in words is "two billion, twenty-one million, three hundred forty thousand, three hundred thirty-one".