315214402121 has 2 divisors, whose sum is σ = 315214402122. Its totient is φ = 315214402120.

The previous prime is 315214402081. The next prime is 315214402171. The reversal of 315214402121 is 121204412513.

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., 315210382096 + 4020025 = 561436^2 + 2005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315214402121 is a prime.

It is not a weakly prime, because it can be changed into another prime (315214402171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157607201060 + 157607201061.

It is an arithmetic number, because the mean of its divisors is an integer number (157607201061).

Almost surely, 2^315214402121 is an apocalyptic number.

It is an amenable number.

315214402121 is a deficient number, since it is larger than the sum of its proper divisors (1).

315214402121 is an equidigital number, since it uses as much as digits as its factorization.

315214402121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 315214402121 its reverse (121204412513), we get a palindrome (436418814634).

The spelling of 315214402121 in words is "three hundred fifteen billion, two hundred fourteen million, four hundred two thousand, one hundred twenty-one".