4331323021 has 2 divisors, whose sum is σ = 4331323022. Its totient is φ = 4331323020.

The previous prime is 4331322997. The next prime is 4331323027. The reversal of 4331323021 is 1203231334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4254952900 + 76370121 = 65230^2 + 8739^2 .

It is a cyclic number.

It is not a de Polignac number, because 4331323021 - 2⁷ = 4331322893 is a prime.

It is a super-2 number, since 2×4331323021² = 37520718224489132882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4331322983 and 4331323001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4331323027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2165661510 + 2165661511.

It is an arithmetic number, because the mean of its divisors is an integer number (2165661511).

Almost surely, 2^4331323021 is an apocalyptic number.

It is an amenable number.

4331323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4331323021 is an equidigital number, since it uses as much as digits as its factorization.

4331323021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 4331323021 is about 65812.7876707863. The cubic root of 4331323021 is about 1630.0722641002.

Adding to 4331323021 its reverse (1203231334), we get a palindrome (5534554355).

The spelling of 4331323021 in words is "four billion, three hundred thirty-one million, three hundred twenty-three thousand, twenty-one".