12121696 has 24 divisors (see below), whose sum is σ = 25121880. Its totient is φ = 5741568.

The previous prime is 12121673. The next prime is 12121699. The reversal of 12121696 is 69612121.

12121696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (12121699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9361 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (1046745).

Almost surely, 2^12121696 is an apocalyptic number.

12121696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12121696 is an abundant number, since it is smaller than the sum of its proper divisors (13000184).

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

12121696 is a wasteful number, since it uses less digits than its factorization.

12121696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966 (or 19958 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 12121696 is about 3481.6226102207. The cubic root of 12121696 is about 229.7141755095.

The spelling of 12121696 in words is "twelve million, one hundred twenty-one thousand, six hundred ninety-six".