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12221011 = 111765353
BaseRepresentation
bin101110100111…
…101001010011
3211222220002001
4232213221103
511112033021
61113534431
7205606525
oct56475123
924886061
1012221011
116997910
124114417
1326bb78a
1418a1a15
151116091
hexba7a53

12221011 has 8 divisors (see below), whose sum is σ = 14116464. Its totient is φ = 10456320.

The previous prime is 12220997. The next prime is 12221021. The reversal of 12221011 is 11012221.

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

It is a cyclic number.

It is not a de Polignac number, because 12221011 - 25 = 12220979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32490 + ... + 32863.

It is an arithmetic number, because the mean of its divisors is an integer number (1764558).

Almost surely, 212221011 is an apocalyptic number.

12221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12221011 is a deficient number, since it is larger than the sum of its proper divisors (1895453).

12221011 is a wasteful number, since it uses less digits than its factorization.

12221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65381.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12221011 is about 3495.8562613471. The cubic root of 12221011 is about 230.3398316052.

Adding to 12221011 its reverse (11012221), we get a palindrome (23233232).

It can be divided in two parts, 122210 and 11, that added together give a palindrome (122221).

The spelling of 12221011 in words is "twelve million, two hundred twenty-one thousand, eleven".

Divisors: 1 11 17 187 65353 718883 1111001 12221011