212665642037 has 2 divisors, whose sum is σ = 212665642038. Its totient is φ = 212665642036.

The previous prime is 212665641967. The next prime is 212665642073. The reversal of 212665642037 is 730246566212.

Together with next prime (212665642073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198340185316 + 14325456721 = 445354^2 + 119689^2 .

It is a cyclic number.

It is not a de Polignac number, because 212665642037 - 2³⁶ = 143946165301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212665612037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106332821018 + 106332821019.

It is an arithmetic number, because the mean of its divisors is an integer number (106332821019).

Almost surely, 2^212665642037 is an apocalyptic number.

It is an amenable number.

212665642037 is a deficient number, since it is larger than the sum of its proper divisors (1).

212665642037 is an equidigital number, since it uses as much as digits as its factorization.

212665642037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 212665642037 in words is "two hundred twelve billion, six hundred sixty-five million, six hundred forty-two thousand, thirty-seven".