21300442441421 has 8 divisors (see below), whose sum is σ = 25024296015264. Its totient is φ = 17874497153520.

The previous prime is 21300442441367. The next prime is 21300442441441. The reversal of 21300442441421 is 12414424400312.

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 21300442441421 - 2⁶ = 21300442441357 is a prime.

It is a super-2 number, since 2×21300442441421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300442441441) 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, 74477071331 + ... + 74477071616.

It is an arithmetic number, because the mean of its divisors is an integer number (3128037001908).

Almost surely, 2^{21300442441421} is an apocalyptic number.

It is an amenable number.

21300442441421 is a deficient number, since it is larger than the sum of its proper divisors (3723853573843).

21300442441421 is a wasteful number, since it uses less digits than its factorization.

21300442441421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148954142971.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21300442441421 its reverse (12414424400312), we get a palindrome (33714866841733).

The spelling of 21300442441421 in words is "twenty-one trillion, three hundred billion, four hundred forty-two million, four hundred forty-one thousand, four hundred twenty-one".