12121528 has 32 divisors (see below), whose sum is σ = 23506560. Its totient is φ = 5856480.

The previous prime is 12121517. The next prime is 12121531. The reversal of 12121528 is 82512121.

It is a junction number, because it is equal to n+sod(n) for n = 12121499 and 12121508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57343 + ... + 57553.

It is an arithmetic number, because the mean of its divisors is an integer number (734580).

Almost surely, 2^12121528 is an apocalyptic number.

It is an amenable number.

12121528 is a deficient number, since it is larger than the sum of its proper divisors (11385032).

12121528 is a wasteful number, since it uses less digits than its factorization.

12121528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 423 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 12121528 is about 3481.5984834556. The cubic root of 12121528 is about 229.7131142675.

Adding to 12121528 its reverse (82512121), we get a palindrome (94633649).

The spelling of 12121528 in words is "twelve million, one hundred twenty-one thousand, five hundred twenty-eight".