21130045441321 has 8 divisors (see below), whose sum is σ = 21194087446944. Its totient is φ = 21066004671360.

The previous prime is 21130045441259. The next prime is 21130045441363. The reversal of 21130045441321 is 12314454003112.

It is a happy number.

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 21130045441321 - 2⁹ = 21130045440809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130045441121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43216206 + ... + 43702408.

It is an arithmetic number, because the mean of its divisors is an integer number (2649260930868).

Almost surely, 2^{21130045441321} is an apocalyptic number.

It is an amenable number.

21130045441321 is a deficient number, since it is larger than the sum of its proper divisors (64042005623).

21130045441321 is a wasteful number, since it uses less digits than its factorization.

21130045441321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617831.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21130045441321 its reverse (12314454003112), we get a palindrome (33444499444433).

The spelling of 21130045441321 in words is "twenty-one trillion, one hundred thirty billion, forty-five million, four hundred forty-one thousand, three hundred twenty-one".