12021369 has 4 divisors (see below), whose sum is σ = 16028496. Its totient is φ = 8014244.

The previous prime is 12021367. The next prime is 12021403. The reversal of 12021369 is 96312021.

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 12021369 - 2¹ = 12021367 is a prime.

It is a super-2 number, since 2×12021369² = 289026625268322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12021367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003559 + ... + 2003564.

It is an arithmetic number, because the mean of its divisors is an integer number (4007124).

Almost surely, 2^12021369 is an apocalyptic number.

It is an amenable number.

12021369 is a deficient number, since it is larger than the sum of its proper divisors (4007127).

12021369 is an equidigital number, since it uses as much as digits as its factorization.

12021369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007126.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12021369 is about 3467.1845927207. The cubic root of 12021369 is about 229.0786645835.

The spelling of 12021369 in words is "twelve million, twenty-one thousand, three hundred sixty-nine".