21020202020001 has 8 divisors (see below), whose sum is σ = 28027376078464. Its totient is φ = 14013247987440.

The previous prime is 21020202019981. The next prime is 21020202020063. The reversal of 21020202020001 is 10002020202012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21020202020001 - 2³⁵ = 20985842281633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020202020101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54783430 + ... + 55165791.

It is an arithmetic number, because the mean of its divisors is an integer number (3503422009808).

Almost surely, 2^{21020202020001} is an apocalyptic number.

It is an amenable number.

21020202020001 is a deficient number, since it is larger than the sum of its proper divisors (7007174058463).

21020202020001 is a wasteful number, since it uses less digits than its factorization.

21020202020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110012951.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21020202020001 its reverse (10002020202012), we get a palindrome (31022222222013).

The spelling of 21020202020001 in words is "twenty-one trillion, twenty billion, two hundred two million, twenty thousand, one".