21020200000101 has 12 divisors (see below), whose sum is σ = 30790152113760. Its totient is φ = 13816093896360.

The previous prime is 21020200000087. The next prime is 21020200000123. The reversal of 21020200000101 is 10100000202012.

It is not a de Polignac number, because 21020200000101 - 2⁷ = 21020199999973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020200000171) by changing a digit.

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, 16447730191 + ... + 16447731468.

It is an arithmetic number, because the mean of its divisors is an integer number (2565846009480).

Almost surely, 2^{21020200000101} is an apocalyptic number.

It is an amenable number.

21020200000101 is a deficient number, since it is larger than the sum of its proper divisors (9769952113659).

21020200000101 is a wasteful number, since it uses less digits than its factorization.

21020200000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32895461736 (or 32895461733 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21020200000101 its reverse (10100000202012), we get a palindrome (31120200202113).

The spelling of 21020200000101 in words is "twenty-one trillion, twenty billion, two hundred million, one hundred one", and thus it is an aban number.