231011213323321 has 2 divisors, whose sum is σ = 231011213323322. Its totient is φ = 231011213323320.

The previous prime is 231011213323301. The next prime is 231011213323333. The reversal of 231011213323321 is 123323312110132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219036596013225 + 11974617310096 = 14799885^2 + 3460436^2 .

It is a cyclic number.

It is not a de Polignac number, because 231011213323321 - 2⁹ = 231011213322809 is a prime.

It is a super-2 number, since 2×231011213323321² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231011213323321.

It is not a weakly prime, because it can be changed into another prime (231011213323301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115505606661660 + 115505606661661.

It is an arithmetic number, because the mean of its divisors is an integer number (115505606661661).

Almost surely, 2^{231011213323321} is an apocalyptic number.

It is an amenable number.

231011213323321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231011213323321 is an equidigital number, since it uses as much as digits as its factorization.

231011213323321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 231011213323321 its reverse (123323312110132), we get a palindrome (354334525433453).

The spelling of 231011213323321 in words is "two hundred thirty-one trillion, eleven billion, two hundred thirteen million, three hundred twenty-three thousand, three hundred twenty-one".