21220341 has 8 divisors (see below), whose sum is σ = 28500864. Its totient is φ = 14043360.

The previous prime is 21220333. The next prime is 21220349. The reversal of 21220341 is 14302212.

It is an interprime number because it is at equal distance from previous prime (21220333) and next prime (21220349).

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

It is not a de Polignac number, because 21220341 - 2³ = 21220333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21220341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220349) 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, 25405 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (3562608).

Almost surely, 2^21220341 is an apocalyptic number.

It is an amenable number.

21220341 is a deficient number, since it is larger than the sum of its proper divisors (7280523).

21220341 is a wasteful number, since it uses less digits than its factorization.

21220341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51771.

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

The square root of 21220341 is about 4606.5541351427. The cubic root of 21220341 is about 276.8539895258.

Adding to 21220341 its reverse (14302212), we get a palindrome (35522553).

The spelling of 21220341 in words is "twenty-one million, two hundred twenty thousand, three hundred forty-one".