21330056331 has 12 divisors (see below), whose sum is σ = 30874409280. Its totient is φ = 14190347760.

The previous prime is 21330056309. The next prime is 21330056339. The reversal of 21330056331 is 13365003312.

It is a happy number.

21330056331 is a `hidden beast` number, since 21 + 3 + 3 + 0 + 0 + 5 + 633 + 1 = 666.

It is not a de Polignac number, because 21330056331 - 2¹¹ = 21330054283 is a prime.

It is a super-2 number, since 2×21330056331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21330056295 and 21330056304.

It is not an unprimeable number, because it can be changed into a prime (21330056339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2469600 + ... + 2478221.

It is an arithmetic number, because the mean of its divisors is an integer number (2572867440).

Almost surely, 2^21330056331 is an apocalyptic number.

21330056331 is a deficient number, since it is larger than the sum of its proper divisors (9544352949).

21330056331 is a wasteful number, since it uses less digits than its factorization.

21330056331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948306 (or 4948303 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

Adding to 21330056331 its reverse (13365003312), we get a palindrome (34695059643).

The spelling of 21330056331 in words is "twenty-one billion, three hundred thirty million, fifty-six thousand, three hundred thirty-one".