12212112211 has 6 divisors (see below), whose sum is σ = 13223766660. Its totient is φ = 11272718808.

The previous prime is 12212112181. The next prime is 12212112233. The reversal of 12212112211 is 11221121221.

It is not a de Polignac number, because 12212112211 - 2⁵ = 12212112179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12212122211) 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 5 ways as a sum of consecutive naturals, for example, 36130341 + ... + 36130678.

It is an arithmetic number, because the mean of its divisors is an integer number (2203961110).

Almost surely, 2^12212112211 is an apocalyptic number.

12212112211 is a deficient number, since it is larger than the sum of its proper divisors (1011654449).

12212112211 is an equidigital number, since it uses as much as digits as its factorization.

12212112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72261045 (or 72261032 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12212112211 its reverse (11221121221), we get a palindrome (23433233432).

The spelling of 12212112211 in words is "twelve billion, two hundred twelve million, one hundred twelve thousand, two hundred eleven".