12021313 has 4 divisors (see below), whose sum is σ = 12038320. Its totient is φ = 12004308.

The previous prime is 12021311. The next prime is 12021353. The reversal of 12021313 is 31312021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12021313 - 2¹ = 12021311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021293 and 12021302.

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 in 3 ways as a sum of consecutive naturals, for example, 7395 + ... + 8872.

It is an arithmetic number, because the mean of its divisors is an integer number (3009580).

Almost surely, 2^12021313 is an apocalyptic number.

It is an amenable number.

12021313 is a deficient number, since it is larger than the sum of its proper divisors (17007).

12021313 is an equidigital number, since it uses as much as digits as its factorization.

12021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17006.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12021313 is about 3467.1765169948. The cubic root of 12021313 is about 229.0783088718.

Adding to 12021313 its reverse (31312021), we get a palindrome (43333334).

The spelling of 12021313 in words is "twelve million, twenty-one thousand, three hundred thirteen".