12221064 has 64 divisors (see below), whose sum is σ = 35136000. Its totient is φ = 3931200.

The previous prime is 12221057. The next prime is 12221071. The reversal of 12221064 is 46012221.

12221064 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 (12221057) and next prime (12221071).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5289 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (549000).

Almost surely, 2^12221064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17568000).

12221064 is an abundant number, since it is smaller than the sum of its proper divisors (22914936).

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

12221064 is a wasteful number, since it uses less digits than its factorization.

12221064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12221064 is about 3495.8638417421. The cubic root of 12221064 is about 230.3401645835.

Adding to 12221064 its reverse (46012221), we get a palindrome (58233285).

The spelling of 12221064 in words is "twelve million, two hundred twenty-one thousand, sixty-four".