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12201121 = 174316691
BaseRepresentation
bin101110100010…
…110010100001
3211221212210101
4232202302201
511110413441
61113302401
7205464532
oct56426241
924855711
1012201121
116983979
124104a01
1326b26ca
141898689
151110231
hexba2ca1

12201121 has 8 divisors (see below), whose sum is σ = 13220064. Its totient is φ = 11215680.

The previous prime is 12201089. The next prime is 12201131. The reversal of 12201121 is 12110221.

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 12201121 - 25 = 12201089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201098 and 12201107.

It is not an unprimeable number, because it can be changed into a prime (12201131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7615 + ... + 9076.

It is an arithmetic number, because the mean of its divisors is an integer number (1652508).

Almost surely, 212201121 is an apocalyptic number.

It is an amenable number.

12201121 is a deficient number, since it is larger than the sum of its proper divisors (1018943).

12201121 is a wasteful number, since it uses less digits than its factorization.

12201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16751.

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

The square root of 12201121 is about 3493.0103063117. The cubic root of 12201121 is about 230.2148024790.

Adding to 12201121 its reverse (12110221), we get a palindrome (24311342).

The spelling of 12201121 in words is "twelve million, two hundred one thousand, one hundred twenty-one".

Divisors: 1 17 43 731 16691 283747 717713 12201121