315221001241 has 2 divisors, whose sum is σ = 315221001242. Its totient is φ = 315221001240.

The previous prime is 315221001239. The next prime is 315221001253. The reversal of 315221001241 is 142100122513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189264152025 + 125956849216 = 435045^2 + 354904^2 .

It is a cyclic number.

It is not a de Polignac number, because 315221001241 - 2¹ = 315221001239 is a prime.

Together with 315221001239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (315221601241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157610500620 + 157610500621.

It is an arithmetic number, because the mean of its divisors is an integer number (157610500621).

Almost surely, 2^315221001241 is an apocalyptic number.

It is an amenable number.

315221001241 is a deficient number, since it is larger than the sum of its proper divisors (1).

315221001241 is an equidigital number, since it uses as much as digits as its factorization.

315221001241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 315221001241 its reverse (142100122513), we get a palindrome (457321123754).

The spelling of 315221001241 in words is "three hundred fifteen billion, two hundred twenty-one million, one thousand, two hundred forty-one".