12161012 has 24 divisors (see below), whose sum is σ = 22063104. Its totient is φ = 5860512.

The previous prime is 12161011. The next prime is 12161027. The reversal of 12161012 is 21016121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161011) 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, 18473 + ... + 19119.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^12161012 is an apocalyptic number.

It is an amenable number.

12161012 is a deficient number, since it is larger than the sum of its proper divisors (9902092).

12161012 is a wasteful number, since it uses less digits than its factorization.

12161012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 12161012 is about 3487.2642572653. The cubic root of 12161012 is about 229.9622622394.

Adding to 12161012 its reverse (21016121), we get a palindrome (33177133).

The spelling of 12161012 in words is "twelve million, one hundred sixty-one thousand, twelve".