212817856204801 has 4 divisors (see below), whose sum is σ = 212914023335892. Its totient is φ = 212721689073712.

The previous prime is 212817856204781. The next prime is 212817856204823. The reversal of 212817856204801 is 108402658718212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209606663884401 + 3211192320400 = 14477799^2 + 1791980^2 .

It is a cyclic number.

It is not a de Polignac number, because 212817856204801 - 2⁷ = 212817856204673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212817856208801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48083562226 + ... + 48083566651.

It is an arithmetic number, because the mean of its divisors is an integer number (53228505833973).

Almost surely, 2^{212817856204801} is an apocalyptic number.

It is an amenable number.

212817856204801 is a deficient number, since it is larger than the sum of its proper divisors (96167131091).

212817856204801 is an equidigital number, since it uses as much as digits as its factorization.

212817856204801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96167131090.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 212817856204801 in words is "two hundred twelve trillion, eight hundred seventeen billion, eight hundred fifty-six million, two hundred four thousand, eight hundred one".