712218044621 has 2 divisors, whose sum is σ = 712218044622. Its totient is φ = 712218044620.

The previous prime is 712218044611. The next prime is 712218044627. The reversal of 712218044621 is 126440812217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700158930025 + 12059114596 = 836755^2 + 109814^2 .

It is an emirp because it is prime and its reverse (126440812217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712218044621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (712218044627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356109022310 + 356109022311.

It is an arithmetic number, because the mean of its divisors is an integer number (356109022311).

Almost surely, 2^712218044621 is an apocalyptic number.

It is an amenable number.

712218044621 is a deficient number, since it is larger than the sum of its proper divisors (1).

712218044621 is an equidigital number, since it uses as much as digits as its factorization.

712218044621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

Adding to 712218044621 its reverse (126440812217), we get a palindrome (838658856838).

The spelling of 712218044621 in words is "seven hundred twelve billion, two hundred eighteen million, forty-four thousand, six hundred twenty-one".