102231311321 has 2 divisors, whose sum is σ = 102231311322. Its totient is φ = 102231311320.

The previous prime is 102231311269. The next prime is 102231311323. The reversal of 102231311321 is 123113132201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99894555721 + 2336755600 = 316061^2 + 48340^2 .

It is a cyclic number.

It is not a de Polignac number, because 102231311321 - 2¹⁰ = 102231310297 is a prime.

It is a super-2 number, since 2×102231311321² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 102231311323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102231311293 and 102231311302.

It is not a weakly prime, because it can be changed into another prime (102231311323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51115655660 + 51115655661.

It is an arithmetic number, because the mean of its divisors is an integer number (51115655661).

Almost surely, 2^102231311321 is an apocalyptic number.

It is an amenable number.

102231311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102231311321 is an equidigital number, since it uses as much as digits as its factorization.

102231311321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 102231311321 its reverse (123113132201), we get a palindrome (225344443522).

The spelling of 102231311321 in words is "one hundred two billion, two hundred thirty-one million, three hundred eleven thousand, three hundred twenty-one".