212212012211 has 4 divisors (see below), whose sum is σ = 219057561024. Its totient is φ = 205366463400.

The previous prime is 212212012189. The next prime is 212212012219. The reversal of 212212012211 is 112210212212.

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-212212012211 is a prime.

It is a super-2 number, since 2×212212012211² (a number of 23 digits) contains 22 as substring.

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 212212012211.

It is not an unprimeable number, because it can be changed into a prime (212212012219) 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, 3422774360 + ... + 3422774421.

It is an arithmetic number, because the mean of its divisors is an integer number (54764390256).

Almost surely, 2^212212012211 is an apocalyptic number.

212212012211 is a deficient number, since it is larger than the sum of its proper divisors (6845548813).

212212012211 is an equidigital number, since it uses as much as digits as its factorization.

212212012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845548812.

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

Adding to 212212012211 its reverse (112210212212), we get a palindrome (324422224423).

The spelling of 212212012211 in words is "two hundred twelve billion, two hundred twelve million, twelve thousand, two hundred eleven".