12214521 has 12 divisors (see below), whose sum is σ = 19247280. Its totient is φ = 7402680.

The previous prime is 12214519. The next prime is 12214523. The reversal of 12214521 is 12541221.

It is an interprime number because it is at equal distance from previous prime (12214519) and next prime (12214523).

It is not a de Polignac number, because 12214521 - 2¹ = 12214519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12214494 and 12214503.

It is not an unprimeable number, because it can be changed into a prime (12214523) 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 11 ways as a sum of consecutive naturals, for example, 61591 + ... + 61788.

It is an arithmetic number, because the mean of its divisors is an integer number (1603940).

Almost surely, 2^12214521 is an apocalyptic number.

12214521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12214521 is a deficient number, since it is larger than the sum of its proper divisors (7032759).

12214521 is a wasteful number, since it uses less digits than its factorization.

12214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123396 (or 123393 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12214521 is about 3494.9278962519. The cubic root of 12214521 is about 230.2990501944.

Adding to 12214521 its reverse (12541221), we get a palindrome (24755742).

The spelling of 12214521 in words is "twelve million, two hundred fourteen thousand, five hundred twenty-one".