21011203203330 has 128 divisors (see below), whose sum is σ = 51049219553280. Its totient is φ = 5534138764800.

The previous prime is 21011203203301. The next prime is 21011203203379. The reversal of 21011203203330 is 3330230211012.

It is a junction number, because it is equal to n+sod(n) for n = 21011203203297 and 21011203203306.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2910538461 + ... + 2910545679.

It is an arithmetic number, because the mean of its divisors is an integer number (398822027760).

Almost surely, 2^{21011203203330} is an apocalyptic number.

21011203203330 is an abundant number, since it is smaller than the sum of its proper divisors (30038016349950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011203203330 is a wasteful number, since it uses less digits than its factorization.

21011203203330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21011203203330 its reverse (3330230211012), we get a palindrome (24341433414342).

The spelling of 21011203203330 in words is "twenty-one trillion, eleven billion, two hundred three million, two hundred three thousand, three hundred thirty".