21002003203322 has 4 divisors (see below), whose sum is σ = 31503004804986. Its totient is φ = 10501001601660.

The previous prime is 21002003203253. The next prime is 21002003203333. The reversal of 21002003203322 is 22330230020012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16385826339481 + 4616176863841 = 4047941^2 + 2148529^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21002003203294 and 21002003203303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250500800829 + ... + 5250500800832.

Almost surely, 2^{21002003203322} is an apocalyptic number.

21002003203322 is a deficient number, since it is larger than the sum of its proper divisors (10501001601664).

21002003203322 is a wasteful number, since it uses less digits than its factorization.

21002003203322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501001601663.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21002003203322 its reverse (22330230020012), we get a palindrome (43332233223334).

The spelling of 21002003203322 in words is "twenty-one trillion, two billion, three million, two hundred three thousand, three hundred twenty-two".