21001303332330 has 32 divisors (see below), whose sum is σ = 50451639264000. Its totient is φ = 5594957414592.

The previous prime is 21001303332299. The next prime is 21001303332337. The reversal of 21001303332330 is 3323330310012.

It is a self number, because there is not a number n which added to its sum of digits gives 21001303332330.

It is not an unprimeable number, because it can be changed into a prime (21001303332337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336852105 + ... + 336914444.

It is an arithmetic number, because the mean of its divisors is an integer number (1576613727000).

Almost surely, 2^{21001303332330} is an apocalyptic number.

21001303332330 is an abundant number, since it is smaller than the sum of its proper divisors (29450335931670).

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

21001303332330 is a wasteful number, since it uses less digits than its factorization.

21001303332330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673767598.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21001303332330 its reverse (3323330310012), we get a palindrome (24324633642342).

The spelling of 21001303332330 in words is "twenty-one trillion, one billion, three hundred three million, three hundred thirty-two thousand, three hundred thirty".