21233030031 has 24 divisors (see below), whose sum is σ = 31392676224. Its totient is φ = 13825507920.

The previous prime is 21233030011. The next prime is 21233030033. The reversal of 21233030031 is 13003033212.

21233030031 is a `hidden beast` number, since 2 + 1 + 2 + 330 + 300 + 31 = 666.

It is not a de Polignac number, because 21233030031 - 2¹⁰ = 21233029007 is a prime.

It is a super-2 number, since 2×21233030031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233029986 and 21233030013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233030033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86901 + ... + 223646.

It is an arithmetic number, because the mean of its divisors is an integer number (1308028176).

Almost surely, 2^21233030031 is an apocalyptic number.

21233030031 is a deficient number, since it is larger than the sum of its proper divisors (10159646193).

21233030031 is a wasteful number, since it uses less digits than its factorization.

21233030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310731 (or 310728 counting only the distinct ones).

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

Adding to 21233030031 its reverse (13003033212), we get a palindrome (34236063243).

The spelling of 21233030031 in words is "twenty-one billion, two hundred thirty-three million, thirty thousand, thirty-one".