213435023221117 has 2 divisors, whose sum is σ = 213435023221118. Its totient is φ = 213435023221116.

The previous prime is 213435023221109. The next prime is 213435023221169. The reversal of 213435023221117 is 711122320534312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170092564138116 + 43342459083001 = 13041954^2 + 6583499^2 .

It is a cyclic number.

It is not a de Polignac number, because 213435023221117 - 2³ = 213435023221109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213435023221177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106717511610558 + 106717511610559.

It is an arithmetic number, because the mean of its divisors is an integer number (106717511610559).

Almost surely, 2^{213435023221117} is an apocalyptic number.

It is an amenable number.

213435023221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

213435023221117 is an equidigital number, since it uses as much as digits as its factorization.

213435023221117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 213435023221117 its reverse (711122320534312), we get a palindrome (924557343755429).

The spelling of 213435023221117 in words is "two hundred thirteen trillion, four hundred thirty-five billion, twenty-three million, two hundred twenty-one thousand, one hundred seventeen".