12122222111211 has 8 divisors (see below), whose sum is σ = 16367557281280. Its totient is φ = 7979184174312.

The previous prime is 12122222111191. The next prime is 12122222111221. The reversal of 12122222111211 is 11211122222121.

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

It is not a de Polignac number, because 12122222111211 - 2⁹ = 12122222110699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122222111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25574308015 + ... + 25574308488.

It is an arithmetic number, because the mean of its divisors is an integer number (2045944660160).

Almost surely, 2^{12122222111211} is an apocalyptic number.

12122222111211 is a deficient number, since it is larger than the sum of its proper divisors (4245335170069).

12122222111211 is an equidigital number, since it uses as much as digits as its factorization.

12122222111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51148616585.

The product of its digits is 128, while the sum is 21.

Adding to 12122222111211 its reverse (11211122222121), we get a palindrome (23333344333332).

The spelling of 12122222111211 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred eleven".