211934329669 has 2 divisors, whose sum is σ = 211934329670. Its totient is φ = 211934329668.

The previous prime is 211934329643. The next prime is 211934329699. The reversal of 211934329669 is 966923439112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183072736900 + 28861592769 = 427870^2 + 169887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211934329669 is a prime.

It is a super-2 number, since 2×211934329669² (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 (211934329609) 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, 105967164834 + 105967164835.

It is an arithmetic number, because the mean of its divisors is an integer number (105967164835).

Almost surely, 2^211934329669 is an apocalyptic number.

It is an amenable number.

211934329669 is a deficient number, since it is larger than the sum of its proper divisors (1).

211934329669 is an equidigital number, since it uses as much as digits as its factorization.

211934329669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 55.

The spelling of 211934329669 in words is "two hundred eleven billion, nine hundred thirty-four million, three hundred twenty-nine thousand, six hundred sixty-nine".