12120812 has 36 divisors (see below), whose sum is σ = 23684640. Its totient is φ = 5422560.

The previous prime is 12120781. The next prime is 12120833. The reversal of 12120812 is 21802121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38078 + ... + 38394.

Almost surely, 2^12120812 is an apocalyptic number.

It is an amenable number.

12120812 is a deficient number, since it is larger than the sum of its proper divisors (11563828).

12120812 is a wasteful number, since it uses less digits than its factorization.

12120812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12120812 is about 3481.4956556055. The cubic root of 12120812 is about 229.7085912451.

Adding to 12120812 its reverse (21802121), we get a palindrome (33922933).

The spelling of 12120812 in words is "twelve million, one hundred twenty thousand, eight hundred twelve".