12221211105 has 48 divisors (see below), whose sum is σ = 21443325696. Its totient is φ = 6438337920.

The previous prime is 12221211091. The next prime is 12221211109. The reversal of 12221211105 is 50111212221.

It is not a de Polignac number, because 12221211105 - 2¹¹ = 12221209057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221211109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1948204 + ... + 1954466.

It is an arithmetic number, because the mean of its divisors is an integer number (446735952).

Almost surely, 2^12221211105 is an apocalyptic number.

12221211105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12221211105 is a deficient number, since it is larger than the sum of its proper divisors (9222114591).

12221211105 is a wasteful number, since it uses less digits than its factorization.

12221211105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798 (or 6795 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12221211105 its reverse (50111212221), we get a palindrome (62332423326).

The spelling of 12221211105 in words is "twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred five".