12212000 has 96 divisors (see below), whose sum is σ = 31135104. Its totient is φ = 4704000.

The previous prime is 12211981. The next prime is 12212021. The reversal of 12212000 is 21221.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171965 + ... + 172035.

It is an arithmetic number, because the mean of its divisors is an integer number (324324).

Almost surely, 2^12212000 is an apocalyptic number.

12212000 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 12212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15567552).

12212000 is an abundant number, since it is smaller than the sum of its proper divisors (18923104).

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

12212000 is an equidigital number, since it uses as much as digits as its factorization.

12212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 121 counting only the distinct ones).

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

The square root of 12212000 is about 3494.5672121165. The cubic root of 12212000 is about 230.2832050144.

Adding to 12212000 its reverse (21221), we get a palindrome (12233221).

The spelling of 12212000 in words is "twelve million, two hundred twelve thousand".