12201155 has 24 divisors (see below), whose sum is σ = 16384032. Its totient is φ = 8676096.

The previous prime is 12201151. The next prime is 12201191. The reversal of 12201155 is 55110221.

12201155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12201155 - 2² = 12201151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12201151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154406 + ... + 154484.

It is an arithmetic number, because the mean of its divisors is an integer number (682668).

Almost surely, 2^12201155 is an apocalyptic number.

12201155 is a deficient number, since it is larger than the sum of its proper divisors (4182877).

12201155 is an equidigital number, since it uses as much as digits as its factorization.

12201155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12201155 is about 3493.0151731706. The cubic root of 12201155 is about 230.2150163199.

Adding to 12201155 its reverse (55110221), we get a palindrome (67311376).

The spelling of 12201155 in words is "twelve million, two hundred one thousand, one hundred fifty-five".