12212222111 has 8 divisors (see below), whose sum is σ = 12473892864. Its totient is φ = 11950627960.

The previous prime is 12212222101. The next prime is 12212222171. The reversal of 12212222111 is 11122221221.

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

It is not a de Polignac number, because 12212222111 - 2⁶ = 12212222047 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 12212222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212222101) 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 7 ways as a sum of consecutive naturals, for example, 400346 + ... + 429768.

It is an arithmetic number, because the mean of its divisors is an integer number (1559236608).

Almost surely, 2^12212222111 is an apocalyptic number.

12212222111 is a deficient number, since it is larger than the sum of its proper divisors (261670753).

12212222111 is an equidigital number, since it uses as much as digits as its factorization.

12212222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38301.

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

Adding to 12212222111 its reverse (11122221221), we get a palindrome (23334443332).

The spelling of 12212222111 in words is "twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred eleven".