21202020001001 has 8 divisors (see below), whose sum is σ = 24236089859904. Its totient is φ = 18169252606800.

The previous prime is 21202020000919. The next prime is 21202020001067. The reversal of 21202020001001 is 10010002020212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21202020001001 - 2³⁰ = 21200946259177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202020051001) 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, 325581290 + ... + 325646403.

It is an arithmetic number, because the mean of its divisors is an integer number (3029511232488).

Almost surely, 2^{21202020001001} is an apocalyptic number.

It is an amenable number.

21202020001001 is a deficient number, since it is larger than the sum of its proper divisors (3034069858903).

21202020001001 is an equidigital number, since it uses as much as digits as its factorization.

21202020001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651232351.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21202020001001 its reverse (10010002020212), we get a palindrome (31212022021213).

The spelling of 21202020001001 in words is "twenty-one trillion, two hundred two billion, twenty million, one thousand, one".