212333117917 has 2 divisors, whose sum is σ = 212333117918. Its totient is φ = 212333117916.

The previous prime is 212333117903. The next prime is 212333117923. The reversal of 212333117917 is 719711333212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205167326116 + 7165791801 = 452954^2 + 84651^2 .

It is a cyclic number.

It is not a de Polignac number, because 212333117917 - 2¹⁵ = 212333085149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212333117917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212333117957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106166558958 + 106166558959.

It is an arithmetic number, because the mean of its divisors is an integer number (106166558959).

Almost surely, 2^212333117917 is an apocalyptic number.

It is an amenable number.

212333117917 is a deficient number, since it is larger than the sum of its proper divisors (1).

212333117917 is an equidigital number, since it uses as much as digits as its factorization.

212333117917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The spelling of 212333117917 in words is "two hundred twelve billion, three hundred thirty-three million, one hundred seventeen thousand, nine hundred seventeen".