12212201100 has 144 divisors (see below), whose sum is σ = 38629777536. Its totient is φ = 2954112000.

The previous prime is 12212201087. The next prime is 12212201137. The reversal of 12212201100 is 110221221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1616532 + ... + 1624068.

It is an arithmetic number, because the mean of its divisors is an integer number (268262344).

Almost surely, 2^12212201100 is an apocalyptic number.

12212201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12212201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19314888768).

12212201100 is an abundant number, since it is smaller than the sum of its proper divisors (26417576436).

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

12212201100 is a wasteful number, since it uses less digits than its factorization.

12212201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8056 (or 8049 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12212201100 its reverse (110221221), we get a palindrome (12322422321).

It can be divided in two parts, 12212 and 201100, that added together give a palindrome (213312).

The spelling of 12212201100 in words is "twelve billion, two hundred twelve million, two hundred one thousand, one hundred".