21330230031 has 12 divisors (see below), whose sum is σ = 33611271720. Its totient is φ = 12927412080.

The previous prime is 21330230029. The next prime is 21330230039. The reversal of 21330230031 is 13003203312.

21330230031 is a `hidden beast` number, since 2 + 1 + 330 + 2 + 300 + 31 = 666.

It is not a de Polignac number, because 21330230031 - 2¹ = 21330230029 is a prime.

It is a super-2 number, since 2×21330230031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21330229986 and 21330230013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330230039) 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, 107728336 + ... + 107728533.

It is an arithmetic number, because the mean of its divisors is an integer number (2800939310).

Almost surely, 2^21330230031 is an apocalyptic number.

21330230031 is a deficient number, since it is larger than the sum of its proper divisors (12281041689).

21330230031 is a wasteful number, since it uses less digits than its factorization.

21330230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215456886 (or 215456883 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21330230031 its reverse (13003203312), we get a palindrome (34333433343).

The spelling of 21330230031 in words is "twenty-one billion, three hundred thirty million, two hundred thirty thousand, thirty-one".