21001020000202 has 24 divisors (see below), whose sum is σ = 34625915856000. Its totient is φ = 9545844524040.

The previous prime is 21001020000179. The next prime is 21001020000241. The reversal of 21001020000202 is 20200002010012.

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 in 11 ways as a sum of consecutive naturals, for example, 42272199 + ... + 42766117.

It is an arithmetic number, because the mean of its divisors is an integer number (1442746494000).

Almost surely, 2^{21001020000202} is an apocalyptic number.

21001020000202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001020000202 is a deficient number, since it is larger than the sum of its proper divisors (13624895855798).

21001020000202 is a wasteful number, since it uses less digits than its factorization.

21001020000202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669642 (or 669631 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21001020000202 its reverse (20200002010012), we get a palindrome (41201022010214).

The spelling of 21001020000202 in words is "twenty-one trillion, one billion, twenty million, two hundred two", and thus it is an aban number.