231301231321 has 2 divisors, whose sum is σ = 231301231322. Its totient is φ = 231301231320.

The previous prime is 231301231253. The next prime is 231301231349. The reversal of 231301231321 is 123132103132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218966907721 + 12334323600 = 467939^2 + 111060^2 .

It is a cyclic number.

It is not a de Polignac number, because 231301231321 - 2¹⁵ = 231301198553 is a prime.

It is a super-2 number, since 2×231301231321² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231301231292 and 231301231301.

It is not a weakly prime, because it can be changed into another prime (231301201321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650615660 + 115650615661.

It is an arithmetic number, because the mean of its divisors is an integer number (115650615661).

Almost surely, 2^231301231321 is an apocalyptic number.

It is an amenable number.

231301231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301231321 is an equidigital number, since it uses as much as digits as its factorization.

231301231321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231301231321 its reverse (123132103132), we get a palindrome (354433334453).

The spelling of 231301231321 in words is "two hundred thirty-one billion, three hundred one million, two hundred thirty-one thousand, three hundred twenty-one".