12121828 has 12 divisors (see below), whose sum is σ = 22135680. Its totient is φ = 5797352.

The previous prime is 12121819. The next prime is 12121831. The reversal of 12121828 is 82812121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65788 + ... + 65971.

It is an arithmetic number, because the mean of its divisors is an integer number (1844640).

Almost surely, 2^12121828 is an apocalyptic number.

It is an amenable number.

12121828 is a deficient number, since it is larger than the sum of its proper divisors (10013852).

12121828 is a wasteful number, since it uses less digits than its factorization.

12121828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131786 (or 131784 counting only the distinct ones).

The product of its digits is 512, while the sum is 25.

The square root of 12121828 is about 3481.6415668475. The cubic root of 12121828 is about 229.7150093357.

Adding to 12121828 its reverse (82812121), we get a palindrome (94933949).

The spelling of 12121828 in words is "twelve million, one hundred twenty-one thousand, eight hundred twenty-eight".