12021316 has 6 divisors (see below), whose sum is σ = 21037310. Its totient is φ = 6010656.

The previous prime is 12021311. The next prime is 12021353. The reversal of 12021316 is 61312021.

It can be written as a sum of positive squares in only one way, i.e., 9947716 + 2073600 = 3154^2 + 1440^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021316.

It is not an unprimeable number, because it can be changed into a prime (12021311) by changing a digit.

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, 1502661 + ... + 1502668.

Almost surely, 2^12021316 is an apocalyptic number.

It is an amenable number.

12021316 is a deficient number, since it is larger than the sum of its proper divisors (9015994).

12021316 is a wasteful number, since it uses less digits than its factorization.

12021316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005333 (or 3005331 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12021316 is about 3467.1769496234. The cubic root of 12021316 is about 229.0783279278.

Adding to 12021316 its reverse (61312021), we get a palindrome (73333337).

The spelling of 12021316 in words is "twelve million, twenty-one thousand, three hundred sixteen".