213031102217 has 2 divisors, whose sum is σ = 213031102218. Its totient is φ = 213031102216.

The previous prime is 213031102201. The next prime is 213031102279. The reversal of 213031102217 is 712201130312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177574588816 + 35456513401 = 421396^2 + 188299^2 .

It is a cyclic number.

It is not a de Polignac number, because 213031102217 - 2⁴ = 213031102201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213031102192 and 213031102201.

It is not a weakly prime, because it can be changed into another prime (213031104217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515551108 + 106515551109.

It is an arithmetic number, because the mean of its divisors is an integer number (106515551109).

Almost surely, 2^213031102217 is an apocalyptic number.

It is an amenable number.

213031102217 is a deficient number, since it is larger than the sum of its proper divisors (1).

213031102217 is an equidigital number, since it uses as much as digits as its factorization.

213031102217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 213031102217 its reverse (712201130312), we get a palindrome (925232232529).

The spelling of 213031102217 in words is "two hundred thirteen billion, thirty-one million, one hundred two thousand, two hundred seventeen".