21042112330 has 8 divisors (see below), whose sum is σ = 37875802212. Its totient is φ = 8416844928.

The previous prime is 21042112297. The next prime is 21042112337. The reversal of 21042112330 is 3321124012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20457294841 + 584817489 = 143029^2 + 24183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21042112298 and 21042112307.

It is not an unprimeable number, because it can be changed into a prime (21042112337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052105607 + ... + 1052105626.

Almost surely, 2^21042112330 is an apocalyptic number.

21042112330 is a deficient number, since it is larger than the sum of its proper divisors (16833689882).

21042112330 is a wasteful number, since it uses less digits than its factorization.

21042112330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104211240.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21042112330 its reverse (3321124012), we get a palindrome (24363236342).

The spelling of 21042112330 in words is "twenty-one billion, forty-two million, one hundred twelve thousand, three hundred thirty".