12219911 has 8 divisors (see below), whose sum is σ = 13442448. Its totient is φ = 11107800.

The previous prime is 12219901. The next prime is 12219913. The reversal of 12219911 is 11991221.

It is not a de Polignac number, because 12219911 - 2²² = 8025607 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12219913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3260 + ... + 5921.

It is an arithmetic number, because the mean of its divisors is an integer number (1680306).

Almost surely, 2^12219911 is an apocalyptic number.

12219911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12219911 is a deficient number, since it is larger than the sum of its proper divisors (1222537).

12219911 is an frugal number, since it uses more digits than its factorization.

12219911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214 (or 9192 counting only the distinct ones).

The product of its digits is 324, while the sum is 26.

The square root of 12219911 is about 3495.6989286836. The cubic root of 12219911 is about 230.3329205180.

The spelling of 12219911 in words is "twelve million, two hundred nineteen thousand, nine hundred eleven".