2331223021 has 2 divisors, whose sum is σ = 2331223022. Its totient is φ = 2331223020.

The previous prime is 2331223009. The next prime is 2331223043. The reversal of 2331223021 is 1203221332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1293481225 + 1037741796 = 35965^2 + 32214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331223021 - 2⁵ = 2331222989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2331223021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331223001) 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, 1165611510 + 1165611511.

It is an arithmetic number, because the mean of its divisors is an integer number (1165611511).

Almost surely, 2^2331223021 is an apocalyptic number.

It is an amenable number.

2331223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331223021 is an equidigital number, since it uses as much as digits as its factorization.

2331223021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2331223021 is about 48282.7404048279. The cubic root of 2331223021 is about 1325.9524223340.

Adding to 2331223021 its reverse (1203221332), we get a palindrome (3534444353).

The spelling of 2331223021 in words is "two billion, three hundred thirty-one million, two hundred twenty-three thousand, twenty-one".