12021512 has 8 divisors (see below), whose sum is σ = 22540350. Its totient is φ = 6010752.

The previous prime is 12021491. The next prime is 12021539. The reversal of 12021512 is 21512021.

It can be written as a sum of positive squares in only one way, i.e., 11464996 + 556516 = 3386^2 + 746^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12021512² = 289033501532288, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 751337 + ... + 751352.

Almost surely, 2^12021512 is an apocalyptic number.

It is an amenable number.

12021512 is a deficient number, since it is larger than the sum of its proper divisors (10518838).

12021512 is a wasteful number, since it uses less digits than its factorization.

12021512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502695 (or 1502691 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12021512 is about 3467.2052145785. The cubic root of 12021512 is about 229.0795729138.

Adding to 12021512 its reverse (21512021), we get a palindrome (33533533).

The spelling of 12021512 in words is "twelve million, twenty-one thousand, five hundred twelve".