21221011020011 has 32 divisors (see below), whose sum is σ = 25304348160000. Its totient is φ = 17570145254400.

The previous prime is 21221011019983. The next prime is 21221011020019. The reversal of 21221011020011 is 11002011012212.

It is a cyclic number.

It is not a de Polignac number, because 21221011020011 - 2⁶ = 21221011019947 is a prime.

It is a super-2 number, since 2×21221011020011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221011020019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94082810 + ... + 94308096.

It is an arithmetic number, because the mean of its divisors is an integer number (790760880000).

Almost surely, 2^{21221011020011} is an apocalyptic number.

21221011020011 is a deficient number, since it is larger than the sum of its proper divisors (4083337139989).

21221011020011 is a wasteful number, since it uses less digits than its factorization.

21221011020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241595.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221011020011 its reverse (11002011012212), we get a palindrome (32223022032223).

The spelling of 21221011020011 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, twenty thousand, eleven".