316023239221 has 2 divisors, whose sum is σ = 316023239222. Its totient is φ = 316023239220.

The previous prime is 316023239201. The next prime is 316023239239. The reversal of 316023239221 is 122932320613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291264216721 + 24759022500 = 539689^2 + 157350^2 .

It is an emirp because it is prime and its reverse (122932320613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316023239221 - 2¹⁹ = 316022714933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316023239201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158011619610 + 158011619611.

It is an arithmetic number, because the mean of its divisors is an integer number (158011619611).

Almost surely, 2^316023239221 is an apocalyptic number.

It is an amenable number.

316023239221 is a deficient number, since it is larger than the sum of its proper divisors (1).

316023239221 is an equidigital number, since it uses as much as digits as its factorization.

316023239221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 316023239221 its reverse (122932320613), we get a palindrome (438955559834).

The spelling of 316023239221 in words is "three hundred sixteen billion, twenty-three million, two hundred thirty-nine thousand, two hundred twenty-one".