12212122111 has 16 divisors (see below), whose sum is σ = 15197875200. Its totient is φ = 9574655328.

The previous prime is 12212122037. The next prime is 12212122127. The reversal of 12212122111 is 11122121221.

It is not a de Polignac number, because 12212122111 - 2⁹ = 12212121599 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 (12212122141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1579255 + ... + 1586968.

It is an arithmetic number, because the mean of its divisors is an integer number (949867200).

Almost surely, 2^12212122111 is an apocalyptic number.

12212122111 is a deficient number, since it is larger than the sum of its proper divisors (2985753089).

12212122111 is a wasteful number, since it uses less digits than its factorization.

12212122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166278.

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

Adding to 12212122111 its reverse (11122121221), we get a palindrome (23334243332).

It can be divided in two parts, 122121221 and 11, that multiplied together give a palindrome (1343333431).

The spelling of 12212122111 in words is "twelve billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".