313131121211 has 2 divisors, whose sum is σ = 313131121212. Its totient is φ = 313131121210.

The previous prime is 313131121159. The next prime is 313131121217. The reversal of 313131121211 is 112121131313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313131121211 - 2¹⁴ = 313131104827 is a prime.

It is not a weakly prime, because it can be changed into another prime (313131121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156565560605 + 156565560606.

It is an arithmetic number, because the mean of its divisors is an integer number (156565560606).

Almost surely, 2^313131121211 is an apocalyptic number.

313131121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

313131121211 is an equidigital number, since it uses as much as digits as its factorization.

313131121211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 20.

Adding to 313131121211 its reverse (112121131313), we get a palindrome (425252252524).

The spelling of 313131121211 in words is "three hundred thirteen billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred eleven".