12211211100 has 108 divisors (see below), whose sum is σ = 38835130712. Its totient is φ = 2960284800.

The previous prime is 12211211087. The next prime is 12211211107. The reversal of 12211211100 is 111211221.

It is a super-2 number, since 2×12211211100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211211107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 131899 + ... + 204498.

Almost surely, 2^12211211100 is an apocalyptic number.

12211211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211211100 is an abundant number, since it is smaller than the sum of its proper divisors (26623919612).

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

12211211100 is a wasteful number, since it uses less digits than its factorization.

12211211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336436 (or 336418 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12211211100 its reverse (111211221), we get a palindrome (12322422321).

It can be divided in two parts, 1221121 and 1100, that added together give a palindrome (1222221).

The spelling of 12211211100 in words is "twelve billion, two hundred eleven million, two hundred eleven thousand, one hundred".