21331313043413 has 8 divisors (see below), whose sum is σ = 21443246678016. Its totient is φ = 21219382027600.

The previous prime is 21331313043289. The next prime is 21331313043427. The reversal of 21331313043413 is 31434031313312.

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 21331313043413 - 2¹² = 21331313039317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21331313043413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331313043433) 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, 16912268 + ... + 18129738.

It is an arithmetic number, because the mean of its divisors is an integer number (2680405834752).

Almost surely, 2^{21331313043413} is an apocalyptic number.

It is an amenable number.

21331313043413 is a deficient number, since it is larger than the sum of its proper divisors (111933634603).

21331313043413 is a wasteful number, since it uses less digits than its factorization.

21331313043413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309395.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 21331313043413 its reverse (31434031313312), we get a palindrome (52765344356725).

The spelling of 21331313043413 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred thirteen million, forty-three thousand, four hundred thirteen".