12221082 has 12 divisors (see below), whose sum is σ = 26479050. Its totient is φ = 4073688.

The previous prime is 12221071. The next prime is 12221087. The reversal of 12221082 is 28012221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12173121 + 47961 = 3489^2 + 219^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 678949 = 12221082 / (1 + 2 + 2 + 2 + 1 + 0 + 8 + 2).

It is not an unprimeable number, because it can be changed into a prime (12221087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339457 + ... + 339492.

Almost surely, 2^12221082 is an apocalyptic number.

12221082 is an abundant number, since it is smaller than the sum of its proper divisors (14257968).

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

12221082 is a wasteful number, since it uses less digits than its factorization.

12221082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678957 (or 678954 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12221082 is about 3495.8664162122. The cubic root of 12221082 is about 230.3402776702.

It can be divided in two parts, 1222 and 1082, that added together give a square (2304 = 48²).

The spelling of 12221082 in words is "twelve million, two hundred twenty-one thousand, eighty-two".