213243332117 has 2 divisors, whose sum is σ = 213243332118. Its totient is φ = 213243332116.

The previous prime is 213243332101. The next prime is 213243332143. The reversal of 213243332117 is 711233342312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111258270916 + 101985061201 = 333554^2 + 319351^2 .

It is a cyclic number.

It is not a de Polignac number, because 213243332117 - 2⁴ = 213243332101 is a prime.

It is a super-2 number, since 2×213243332117² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213243332417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621666058 + 106621666059.

It is an arithmetic number, because the mean of its divisors is an integer number (106621666059).

Almost surely, 2^213243332117 is an apocalyptic number.

It is an amenable number.

213243332117 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243332117 is an equidigital number, since it uses as much as digits as its factorization.

213243332117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

Adding to 213243332117 its reverse (711233342312), we get a palindrome (924476674429).

The spelling of 213243332117 in words is "two hundred thirteen billion, two hundred forty-three million, three hundred thirty-two thousand, one hundred seventeen".