12221010 has 32 divisors (see below), whose sum is σ = 32590080. Its totient is φ = 3258864.

The previous prime is 12220997. The next prime is 12221021. The reversal of 12221010 is 1012221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12220983 and 12221001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22362 + ... + 22901.

It is an arithmetic number, because the mean of its divisors is an integer number (1018440).

Almost surely, 2^12221010 is an apocalyptic number.

12221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221010 is an abundant number, since it is smaller than the sum of its proper divisors (20369070).

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

12221010 is a wasteful number, since it uses less digits than its factorization.

12221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45279 (or 45273 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12221010 is about 3495.8561183207. The cubic root of 12221010 is about 230.3398253226.

Adding to 12221010 its reverse (1012221), we get a palindrome (13233231).

The spelling of 12221010 in words is "twelve million, two hundred twenty-one thousand, ten".