212005606500557 has 2 divisors, whose sum is σ = 212005606500558. Its totient is φ = 212005606500556.

The previous prime is 212005606500491. The next prime is 212005606500631. The reversal of 212005606500557 is 755005606500212.

It is a happy number.

212005606500557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125916361792516 + 86089244708041 = 11221246^2 + 9278429^2 .

It is a cyclic number.

It is not a de Polignac number, because 212005606500557 - 2¹² = 212005606496461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212005606500757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106002803250278 + 106002803250279.

It is an arithmetic number, because the mean of its divisors is an integer number (106002803250279).

Almost surely, 2^{212005606500557} is an apocalyptic number.

It is an amenable number.

212005606500557 is a deficient number, since it is larger than the sum of its proper divisors (1).

212005606500557 is an equidigital number, since it uses as much as digits as its factorization.

212005606500557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 212005606500557 in words is "two hundred twelve trillion, five billion, six hundred six million, five hundred thousand, five hundred fifty-seven".