21331320003331 has 24 divisors (see below), whose sum is σ = 24019337294960. Its totient is φ = 18830476247616.

The previous prime is 21331320003233. The next prime is 21331320003379. The reversal of 21331320003331 is 13330002313312.

It is not a de Polignac number, because 21331320003331 - 2⁹ = 21331320002819 is a prime.

It is a super-2 number, since 2×21331320003331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331320003296 and 21331320003305.

It is not an unprimeable number, because it can be changed into a prime (21331320001331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33443260 + ... + 34075126.

Almost surely, 2^{21331320003331} is an apocalyptic number.

21331320003331 is a deficient number, since it is larger than the sum of its proper divisors (2688017291629).

21331320003331 is a wasteful number, since it uses less digits than its factorization.

21331320003331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636835 (or 636812 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 21331320003331 its reverse (13330002313312), we get a palindrome (34661322316643).

The spelling of 21331320003331 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty million, three thousand, three hundred thirty-one".