212004335885 has 4 divisors (see below), whose sum is σ = 254405203068. Its totient is φ = 169603468704.

The previous prime is 212004335857. The next prime is 212004335887. The reversal of 212004335885 is 588533400212.

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 167629649476 + 44374686409 = 409426^2 + 210653^2 .

It is a cyclic number.

It is not a de Polignac number, because 212004335885 - 2¹⁸ = 212004073741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212004335887) 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, 21200433584 + ... + 21200433593.

It is an arithmetic number, because the mean of its divisors is an integer number (63601300767).

Almost surely, 2^212004335885 is an apocalyptic number.

It is an amenable number.

212004335885 is a deficient number, since it is larger than the sum of its proper divisors (42400867183).

212004335885 is an equidigital number, since it uses as much as digits as its factorization.

212004335885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42400867182.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 212004335885 in words is "two hundred twelve billion, four million, three hundred thirty-five thousand, eight hundred eighty-five".