212212079 has 4 divisors (see below), whose sum is σ = 214090176. Its totient is φ = 210333984.

The previous prime is 212212073. The next prime is 212212093. The reversal of 212212079 is 970212212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212212079 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 (212212073) 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, 938879 + ... + 939104.

It is an arithmetic number, because the mean of its divisors is an integer number (53522544).

Almost surely, 2^212212079 is an apocalyptic number.

212212079 is a deficient number, since it is larger than the sum of its proper divisors (1878097).

212212079 is a wasteful number, since it uses less digits than its factorization.

212212079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878096.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 212212079 is about 14567.5007808478. The cubic root of 212212079 is about 596.4719613065.

The spelling of 212212079 in words is "two hundred twelve million, two hundred twelve thousand, seventy-nine".