21220021020011 has 8 divisors (see below), whose sum is σ = 23947359145200. Its totient is φ = 18625723779040.

The previous prime is 21220021019999. The next prime is 21220021020049. The reversal of 21220021020011 is 11002012002212.

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 21220021020011 - 2¹⁴ = 21220021003627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220021020811) 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 7 ways as a sum of consecutive naturals, for example, 33260220716 + ... + 33260221353.

It is an arithmetic number, because the mean of its divisors is an integer number (2993419893150).

Almost surely, 2^{21220021020011} is an apocalyptic number.

21220021020011 is a deficient number, since it is larger than the sum of its proper divisors (2727338125189).

21220021020011 is a wasteful number, since it uses less digits than its factorization.

21220021020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66520442109.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220021020011 its reverse (11002012002212), we get a palindrome (32222033022223).

The spelling of 21220021020011 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, twenty thousand, eleven".