12161212 has 18 divisors (see below), whose sum is σ = 24757152. Its totient is φ = 5211864.

The previous prime is 12161189. The next prime is 12161213. The reversal of 12161212 is 21216121.

12161212 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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

12161212 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30828 + ... + 31219.

Almost surely, 2^12161212 is an apocalyptic number.

It is an amenable number.

12161212 is an abundant number, since it is smaller than the sum of its proper divisors (12595940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12161212 is a wasteful number, since it uses less digits than its factorization.

12161212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62065 (or 62056 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 12161212 is about 3487.2929329209. The cubic root of 12161212 is about 229.9635228856.

Adding to 12161212 its reverse (21216121), we get a palindrome (33377333).

The spelling of 12161212 in words is "twelve million, one hundred sixty-one thousand, two hundred twelve".