12161107 has 16 divisors (see below), whose sum is σ = 14257152. Its totient is φ = 10159200.

The previous prime is 12161099. The next prime is 12161113. The reversal of 12161107 is 70116121.

It is a cyclic number.

It is not a de Polignac number, because 12161107 - 2³ = 12161099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12161117) 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 15 ways as a sum of consecutive naturals, for example, 72738 + ... + 72904.

It is an arithmetic number, because the mean of its divisors is an integer number (891072).

Almost surely, 2^12161107 is an apocalyptic number.

12161107 is a deficient number, since it is larger than the sum of its proper divisors (2096045).

12161107 is a wasteful number, since it uses less digits than its factorization.

12161107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 12161107 is about 3487.2778782311. The cubic root of 12161107 is about 229.9628610481.

Adding to 12161107 its reverse (70116121), we get a palindrome (82277228).

The spelling of 12161107 in words is "twelve million, one hundred sixty-one thousand, one hundred seven".