13022421 has 24 divisors (see below), whose sum is σ = 18696480. Its totient is φ = 8048544.

The previous prime is 13022417. The next prime is 13022423. The reversal of 13022421 is 12422031.

It is not a de Polignac number, because 13022421 - 2² = 13022417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13022421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022423) 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 23 ways as a sum of consecutive naturals, for example, 220690 + ... + 220748.

It is an arithmetic number, because the mean of its divisors is an integer number (779020).

Almost surely, 2^13022421 is an apocalyptic number.

It is an amenable number.

13022421 is a deficient number, since it is larger than the sum of its proper divisors (5674059).

13022421 is an equidigital number, since it uses as much as digits as its factorization.

13022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 13022421 is about 3608.6591692760. The cubic root of 13022421 is about 235.2685687615.

Adding to 13022421 its reverse (12422031), we get a palindrome (25444452).

The spelling of 13022421 in words is "thirteen million, twenty-two thousand, four hundred twenty-one".