212331065677 has 2 divisors, whose sum is σ = 212331065678. Its totient is φ = 212331065676.

The previous prime is 212331065663. The next prime is 212331065689. The reversal of 212331065677 is 776560133212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124616766121 + 87714299556 = 353011^2 + 296166^2 .

It is a cyclic number.

It is not a de Polignac number, because 212331065677 - 2²⁷ = 212196847949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212331065657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106165532838 + 106165532839.

It is an arithmetic number, because the mean of its divisors is an integer number (106165532839).

Almost surely, 2^212331065677 is an apocalyptic number.

It is an amenable number.

212331065677 is a deficient number, since it is larger than the sum of its proper divisors (1).

212331065677 is an equidigital number, since it uses as much as digits as its factorization.

212331065677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

Adding to 212331065677 its reverse (776560133212), we get a palindrome (988891198889).

The spelling of 212331065677 in words is "two hundred twelve billion, three hundred thirty-one million, sixty-five thousand, six hundred seventy-seven".