12121552 has 20 divisors (see below), whose sum is σ = 24507360. Its totient is φ = 5797088.

The previous prime is 12121547. The next prime is 12121579. The reversal of 12121552 is 25512121.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 16102 + ... + 16837.

It is an arithmetic number, because the mean of its divisors is an integer number (1225368).

Almost surely, 2^12121552 is an apocalyptic number.

It is an amenable number.

12121552 is an abundant number, since it is smaller than the sum of its proper divisors (12385808).

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

12121552 is a wasteful number, since it uses less digits than its factorization.

12121552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32970 (or 32964 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 12121552 is about 3481.6019301465. The cubic root of 12121552 is about 229.7132658741.

Adding to 12121552 its reverse (25512121), we get a palindrome (37633673).

The spelling of 12121552 in words is "twelve million, one hundred twenty-one thousand, five hundred fifty-two".