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BaseRepresentation
bin101110100111…
…101011000010
3211222220020011
4232213223002
511112033442
61113535134
7205610044
oct56475302
924886204
1012221122
116997a01
1241144aa
1326bb844
1418a1a94
151116117
hexba7ac2

12221122 has 8 divisors (see below), whose sum is σ = 18963900. Its totient is φ = 5899824.

The previous prime is 12221117. The next prime is 12221171. The reversal of 12221122 is 22112221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11162281 + 1058841 = 3341^2 + 1029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nude number because it is divisible by every one of its digits.

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, 105297 + ... + 105412.

Almost surely, 212221122 is an apocalyptic number.

12221122 is a deficient number, since it is larger than the sum of its proper divisors (6742778).

12221122 is a wasteful number, since it uses less digits than its factorization.

12221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210740.

The product of its digits is 32, while the sum is 13.

The square root of 12221122 is about 3495.8721372499. The cubic root of 12221122 is about 230.3405289737.

Adding to 12221122 its reverse (22112221), we get a palindrome (34333343).

The spelling of 12221122 in words is "twelve million, two hundred twenty-one thousand, one hundred twenty-two".

Divisors: 1 2 29 58 210709 421418 6110561 12221122