12161101 has 4 divisors (see below), whose sum is σ = 12211804. Its totient is φ = 12110400.

The previous prime is 12161099. The next prime is 12161113. The reversal of 12161101 is 10116121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10116121 = 73 ⋅138577.

It can be written as a sum of positive squares in 2 ways, for example, as 9517225 + 2643876 = 3085^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 12161101 - 2¹ = 12161099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161141) 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 3 ways as a sum of consecutive naturals, for example, 24990 + ... + 25471.

It is an arithmetic number, because the mean of its divisors is an integer number (3052951).

Almost surely, 2^12161101 is an apocalyptic number.

It is an amenable number.

12161101 is a deficient number, since it is larger than the sum of its proper divisors (50703).

12161101 is an equidigital number, since it uses as much as digits as its factorization.

12161101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50702.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 12161101 is about 3487.2770179611. The cubic root of 12161101 is about 229.9628232287.

Adding to 12161101 its reverse (10116121), we get a palindrome (22277222).

The spelling of 12161101 in words is "twelve million, one hundred sixty-one thousand, one hundred one".