316023231221 has 2 divisors, whose sum is σ = 316023231222. Its totient is φ = 316023231220.

The previous prime is 316023231197. The next prime is 316023231257. The reversal of 316023231221 is 122132320613.

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., 160389036196 + 155634195025 = 400486^2 + 394505^2 .

It is a cyclic number.

It is not a de Polignac number, because 316023231221 - 2³⁰ = 314949489397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316023239221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158011615610 + 158011615611.

It is an arithmetic number, because the mean of its divisors is an integer number (158011615611).

Almost surely, 2^316023231221 is an apocalyptic number.

It is an amenable number.

316023231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

316023231221 is an equidigital number, since it uses as much as digits as its factorization.

316023231221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 316023231221 its reverse (122132320613), we get a palindrome (438155551834).

The spelling of 316023231221 in words is "three hundred sixteen billion, twenty-three million, two hundred thirty-one thousand, two hundred twenty-one".