21330241331 has 16 divisors (see below), whose sum is σ = 26257870848. Its totient is φ = 16924010400.

The previous prime is 21330241279. The next prime is 21330241357. The reversal of 21330241331 is 13314203312.

It is a cyclic number.

It is not a de Polignac number, because 21330241331 - 2¹⁰ = 21330240307 is a prime.

It is a super-2 number, since 2×21330241331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330241297 and 21330241306.

It is not an unprimeable number, because it can be changed into a prime (21330241531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131880 + ... + 2141861.

It is an arithmetic number, because the mean of its divisors is an integer number (1641116928).

Almost surely, 2^21330241331 is an apocalyptic number.

21330241331 is a deficient number, since it is larger than the sum of its proper divisors (4927629517).

21330241331 is a wasteful number, since it uses less digits than its factorization.

21330241331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273802.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21330241331 its reverse (13314203312), we get a palindrome (34644444643).

The spelling of 21330241331 in words is "twenty-one billion, three hundred thirty million, two hundred forty-one thousand, three hundred thirty-one".