Search a number
-
+
12221012 = 229913083
BaseRepresentation
bin101110100111…
…101001010100
3211222220002002
4232213221110
511112033022
61113534432
7205606526
oct56475124
924886062
1012221012
116997911
124114418
1326bb78b
1418a1a16
151116092
hexba7a54

12221012 has 12 divisors (see below), whose sum is σ = 21415296. Its totient is φ = 6102360.

The previous prime is 12220997. The next prime is 12221021. The reversal of 12221012 is 21012221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12220984 and 12221002.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2423 + ... + 5505.

It is an arithmetic number, because the mean of its divisors is an integer number (1784608).

Almost surely, 212221012 is an apocalyptic number.

It is an amenable number.

12221012 is a deficient number, since it is larger than the sum of its proper divisors (9194284).

12221012 is a wasteful number, since it uses less digits than its factorization.

12221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078 (or 4076 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12221012 is about 3495.8564043736. The cubic root of 12221012 is about 230.3398378878.

Adding to 12221012 its reverse (21012221), we get a palindrome (33233233).

The spelling of 12221012 in words is "twelve million, two hundred twenty-one thousand, twelve".

Divisors: 1 2 4 991 1982 3083 3964 6166 12332 3055253 6110506 12221012