12051321 has 4 divisors (see below), whose sum is σ = 16068432. Its totient is φ = 8034212.

The previous prime is 12051293. The next prime is 12051323. The reversal of 12051321 is 12315021.

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 12051321 - 2¹¹ = 12049273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12051321.

It is not an unprimeable number, because it can be changed into a prime (12051323) 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, 2008551 + ... + 2008556.

It is an arithmetic number, because the mean of its divisors is an integer number (4017108).

Almost surely, 2^12051321 is an apocalyptic number.

It is an amenable number.

12051321 is a deficient number, since it is larger than the sum of its proper divisors (4017111).

12051321 is an equidigital number, since it uses as much as digits as its factorization.

12051321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017110.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12051321 is about 3471.5012602619. The cubic root of 12051321 is about 229.2687614444.

Adding to 12051321 its reverse (12315021), we get a palindrome (24366342).

It can be divided in two parts, 12051 and 321, that multiplied together give a triangular number (3868371 = T₂₇₈₁).

The spelling of 12051321 in words is "twelve million, fifty-one thousand, three hundred twenty-one".