212207443861 has 8 divisors (see below), whose sum is σ = 242556151104. Its totient is φ = 181867076160.

The previous prime is 212207443849. The next prime is 212207443867. The reversal of 212207443861 is 168344702212.

212207443861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212207443861 - 2¹³ = 212207435669 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 (212207443867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030260 + ... + 2132221.

It is an arithmetic number, because the mean of its divisors is an integer number (30319518888).

Almost surely, 2^212207443861 is an apocalyptic number.

It is an amenable number.

212207443861 is a deficient number, since it is larger than the sum of its proper divisors (30348707243).

212207443861 is an equidigital number, since it uses as much as digits as its factorization.

212207443861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169771.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 212207443861 in words is "two hundred twelve billion, two hundred seven million, four hundred forty-three thousand, eight hundred sixty-one".