13124221 has 8 divisors (see below), whose sum is σ = 15159744. Its totient is φ = 11229120.

The previous prime is 13124213. The next prime is 13124227. The reversal of 13124221 is 12242131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13124221 - 2³ = 13124213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13124195 and 13124204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34905 + ... + 35278.

It is an arithmetic number, because the mean of its divisors is an integer number (1894968).

Almost surely, 2^13124221 is an apocalyptic number.

13124221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13124221 is a deficient number, since it is larger than the sum of its proper divisors (2035523).

13124221 is a wasteful number, since it uses less digits than its factorization.

13124221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70211.

The product of its digits is 96, while the sum is 16.

The square root of 13124221 is about 3622.7366727379. The cubic root of 13124221 is about 235.8800321507.

Adding to 13124221 its reverse (12242131), we get a palindrome (25366352).

The spelling of 13124221 in words is "thirteen million, one hundred twenty-four thousand, two hundred twenty-one".