21003220330 has 8 divisors (see below), whose sum is σ = 37805796612. Its totient is φ = 8401288128.

The previous prime is 21003220319. The next prime is 21003220351. The reversal of 21003220330 is 3302230012.

It can be written as a sum of positive squares in 2 ways, for example, as 20229657361 + 773562969 = 142231^2 + 27813^2 .

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

It is a super-2 number, since 2×21003220330² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050161007 + ... + 1050161026.

Almost surely, 2^21003220330 is an apocalyptic number.

21003220330 is a deficient number, since it is larger than the sum of its proper divisors (16802576282).

21003220330 is a wasteful number, since it uses less digits than its factorization.

21003220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100322040.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21003220330 its reverse (3302230012), we get a palindrome (24305450342).

The spelling of 21003220330 in words is "twenty-one billion, three million, two hundred twenty thousand, three hundred thirty".