12221211100 has 36 divisors (see below), whose sum is σ = 30308605264. Its totient is φ = 4190129280.

The previous prime is 12221211091. The next prime is 12221211109. The reversal of 12221211100 is 111212221.

12221211100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12221211091) and next prime (12221211109).

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8728737 + ... + 8730136.

Almost surely, 2^12221211100 is an apocalyptic number.

12221211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221211100 is an abundant number, since it is smaller than the sum of its proper divisors (18087394164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221211100 is a wasteful number, since it uses less digits than its factorization.

12221211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17458894 (or 17458887 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12221211100 its reverse (111212221), we get a palindrome (12332423321).

It can be divided in two parts, 1222121 and 1100, that added together give a palindrome (1223221).

The spelling of 12221211100 in words is "twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred".