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12222122111 = 67182419733
BaseRepresentation
bin10110110000111111…
…01100100001111111
31011112210002010121022
423120133230201333
5200012330401421
65340442254355
7611606216033
oct133037544177
934483063538
1012222122111
115202084271
1224511b73bb
1311ca196124
1483d31c1c3
154b7ee97ab
hex2d87ec87f

12222122111 has 4 divisors (see below), whose sum is σ = 12404541912. Its totient is φ = 12039702312.

The previous prime is 12222122083. The next prime is 12222122147. The reversal of 12222122111 is 11122122221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122122221 = 71588874603.

It is a cyclic number.

It is not a de Polignac number, because 12222122111 - 222 = 12217927807 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 12222122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222128111) 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, 91209800 + ... + 91209933.

It is an arithmetic number, because the mean of its divisors is an integer number (3101135478).

Almost surely, 212222122111 is an apocalyptic number.

12222122111 is a deficient number, since it is larger than the sum of its proper divisors (182419801).

12222122111 is an equidigital number, since it uses as much as digits as its factorization.

12222122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182419800.

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

Adding to 12222122111 its reverse (11122122221), we get a palindrome (23344244332).

The spelling of 12222122111 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".

Divisors: 1 67 182419733 12222122111