13112421 has 8 divisors (see below), whose sum is σ = 19980864. Its totient is φ = 7492800.

The previous prime is 13112419. The next prime is 13112431. The reversal of 13112421 is 12421131.

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

It is not a de Polignac number, because 13112421 - 2¹ = 13112419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13112421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312180 + ... + 312221.

It is an arithmetic number, because the mean of its divisors is an integer number (2497608).

Almost surely, 2^13112421 is an apocalyptic number.

It is an amenable number.

13112421 is a deficient number, since it is larger than the sum of its proper divisors (6868443).

13112421 is an equidigital number, since it uses as much as digits as its factorization.

13112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624411.

The product of its digits is 48, while the sum is 15.

The square root of 13112421 is about 3621.1077034521. The cubic root of 13112421 is about 235.8093176303.

Adding to 13112421 its reverse (12421131), we get a palindrome (25533552).

The spelling of 13112421 in words is "thirteen million, one hundred twelve thousand, four hundred twenty-one".