21321124431441 has 8 divisors (see below), whose sum is σ = 28428192784320. Its totient is φ = 14214069516432.

The previous prime is 21321124431401. The next prime is 21321124431469. The reversal of 21321124431441 is 14413442112312.

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

It is not a de Polignac number, because 21321124431441 - 2¹⁷ = 21321124300369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21321124431401) 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, 1243780 + ... + 6647498.

It is an arithmetic number, because the mean of its divisors is an integer number (3553524098040).

Almost surely, 2^{21321124431441} is an apocalyptic number.

It is an amenable number.

21321124431441 is a deficient number, since it is larger than the sum of its proper divisors (7107068352879).

21321124431441 is a wasteful number, since it uses less digits than its factorization.

21321124431441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718935.

The product of its digits is 18432, while the sum is 33.

Adding to 21321124431441 its reverse (14413442112312), we get a palindrome (35734566543753).

The spelling of 21321124431441 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-four million, four hundred thirty-one thousand, four hundred forty-one".