21033011330 has 16 divisors (see below), whose sum is σ = 38284808760. Its totient is φ = 8318673792.

The previous prime is 21033011323. The next prime is 21033011333. The reversal of 21033011330 is 3311033012.

It can be written as a sum of positive squares in 4 ways, for example, as 11223495481 + 9809515849 = 105941^2 + 99043^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21033011299 and 21033011308.

It is not an unprimeable number, because it can be changed into a prime (21033011333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11815409 + ... + 11817188.

Almost surely, 2^21033011330 is an apocalyptic number.

21033011330 is a deficient number, since it is larger than the sum of its proper divisors (17251797430).

21033011330 is a wasteful number, since it uses less digits than its factorization.

21033011330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23632693.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21033011330 its reverse (3311033012), we get a palindrome (24344044342).

The spelling of 21033011330 in words is "twenty-one billion, thirty-three million, eleven thousand, three hundred thirty".