2231323321321 has 2 divisors, whose sum is σ = 2231323321322. Its totient is φ = 2231323321320.

The previous prime is 2231323321303. The next prime is 2231323321363. The reversal of 2231323321321 is 1231233231322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251738053721 + 979585267600 = 1118811^2 + 989740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231323321321 - 2⁷ = 2231323321193 is a prime.

It is a super-3 number, since 3×2231323321321³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2231323321321.

It is not a weakly prime, because it can be changed into another prime (2231323321421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115661660660 + 1115661660661.

It is an arithmetic number, because the mean of its divisors is an integer number (1115661660661).

Almost surely, 2^{2231323321321} is an apocalyptic number.

It is an amenable number.

2231323321321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231323321321 is an equidigital number, since it uses as much as digits as its factorization.

2231323321321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 28.

Adding to 2231323321321 its reverse (1231233231322), we get a palindrome (3462556552643).

It can be divided in two parts, 223132 and 3321321, that added together give a palindrome (3544453).

The spelling of 2231323321321 in words is "two trillion, two hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-one".