212100564497 has 2 divisors, whose sum is σ = 212100564498. Its totient is φ = 212100564496.

The previous prime is 212100564469. The next prime is 212100564503. The reversal of 212100564497 is 794465001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194614204801 + 17486359696 = 441151^2 + 132236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212100564497 is a prime.

It is not a weakly prime, because it can be changed into another prime (212100564427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050282248 + 106050282249.

It is an arithmetic number, because the mean of its divisors is an integer number (106050282249).

Almost surely, 2^212100564497 is an apocalyptic number.

It is an amenable number.

212100564497 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100564497 is an equidigital number, since it uses as much as digits as its factorization.

212100564497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 212100564497 in words is "two hundred twelve billion, one hundred million, five hundred sixty-four thousand, four hundred ninety-seven".