212212201211 has 4 divisors (see below), whose sum is σ = 212213220912. Its totient is φ = 212211181512.

The previous prime is 212212201181. The next prime is 212212201217. The reversal of 212212201211 is 112102212212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212212201211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212212201211.

It is not an unprimeable number, because it can be changed into a prime (212212201217) 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, 72800 + ... + 655533.

It is an arithmetic number, because the mean of its divisors is an integer number (53053305228).

Almost surely, 2^212212201211 is an apocalyptic number.

212212201211 is a deficient number, since it is larger than the sum of its proper divisors (1019701).

212212201211 is an equidigital number, since it uses as much as digits as its factorization.

212212201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019700.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212212201211 its reverse (112102212212), we get a palindrome (324314413423).

The spelling of 212212201211 in words is "two hundred twelve billion, two hundred twelve million, two hundred one thousand, two hundred eleven".