21042331330 has 8 divisors (see below), whose sum is σ = 37876196412. Its totient is φ = 8416932528.

The previous prime is 21042331279. The next prime is 21042331339. The reversal of 21042331330 is 3313324012.

It can be written as a sum of positive squares in 2 ways, for example, as 20774321689 + 268009641 = 144133^2 + 16371^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21042331339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052116557 + ... + 1052116576.

Almost surely, 2^21042331330 is an apocalyptic number.

21042331330 is a deficient number, since it is larger than the sum of its proper divisors (16833865082).

21042331330 is a wasteful number, since it uses less digits than its factorization.

21042331330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104233140.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21042331330 its reverse (3313324012), we get a palindrome (24355655342).

The spelling of 21042331330 in words is "twenty-one billion, forty-two million, three hundred thirty-one thousand, three hundred thirty".