101231321 has 2 divisors, whose sum is σ = 101231322. Its totient is φ = 101231320.

The previous prime is 101231293. The next prime is 101231323. The reversal of 101231321 is 123132101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 6071296 = 9755^2 + 2464^2 .

It is an emirp because it is prime and its reverse (123132101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101231321 - 2¹⁸ = 100969177 is a prime.

Together with 101231323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 101231296 and 101231305.

It is not a weakly prime, because it can be changed into another prime (101231323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615660 + 50615661.

It is an arithmetic number, because the mean of its divisors is an integer number (50615661).

Almost surely, 2^101231321 is an apocalyptic number.

It is an amenable number.

101231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

101231321 is an equidigital number, since it uses as much as digits as its factorization.

101231321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 101231321 is about 10061.3776889649. The cubic root of 101231321 is about 466.0562124039.

Adding to 101231321 its reverse (123132101), we get a palindrome (224363422).

The spelling of 101231321 in words is "one hundred one million, two hundred thirty-one thousand, three hundred twenty-one".