12211323210 has 128 divisors (see below), whose sum is σ = 34835754240. Its totient is φ = 3033096192.

The previous prime is 12211323149. The next prime is 12211323211. The reversal of 12211323210 is 1232311221.

12211323210 is a `hidden beast` number, since 122 + 11 + 323 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12211323211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 431517 + ... + 458943.

It is an arithmetic number, because the mean of its divisors is an integer number (272154330).

Almost surely, 2^12211323210 is an apocalyptic number.

12211323210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211323210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17417877120).

12211323210 is an abundant number, since it is smaller than the sum of its proper divisors (22624431030).

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

12211323210 is a wasteful number, since it uses less digits than its factorization.

12211323210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27557 (or 27551 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12211323210 its reverse (1232311221), we get a palindrome (13443634431).

The spelling of 12211323210 in words is "twelve billion, two hundred eleven million, three hundred twenty-three thousand, two hundred ten".