12121508 has 24 divisors (see below), whose sum is σ = 24498432. Its totient is φ = 5140224.

The previous prime is 12121481. The next prime is 12121511. The reversal of 12121508 is 80512121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485 + ... + 4947.

It is an arithmetic number, because the mean of its divisors is an integer number (1020768).

Almost surely, 2^12121508 is an apocalyptic number.

It is an amenable number.

12121508 is an abundant number, since it is smaller than the sum of its proper divisors (12376924).

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

12121508 is a wasteful number, since it uses less digits than its factorization.

12121508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12121508 is about 3481.5956112105. The cubic root of 12121508 is about 229.7129879285.

Adding to 12121508 its reverse (80512121), we get a palindrome (92633629).

The spelling of 12121508 in words is "twelve million, one hundred twenty-one thousand, five hundred eight".