21002003202 has 64 divisors (see below), whose sum is σ = 45058000896. Its totient is φ = 6511317120.

The previous prime is 21002003171. The next prime is 21002003213. The reversal of 21002003202 is 20230020012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 700573 + ... + 729935.

It is an arithmetic number, because the mean of its divisors is an integer number (704031264).

Almost surely, 2^21002003202 is an apocalyptic number.

21002003202 is an abundant number, since it is smaller than the sum of its proper divisors (24055997694).

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

21002003202 is a wasteful number, since it uses less digits than its factorization.

21002003202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29535.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21002003202 its reverse (20230020012), we get a palindrome (41232023214).

The spelling of 21002003202 in words is "twenty-one billion, two million, three thousand, two hundred two".