21220102220011 has 6 divisors (see below), whose sum is σ = 21977061872012. Its totient is φ = 20488374556440.

The previous prime is 21220102219991. The next prime is 21220102220041. The reversal of 21220102220011 is 11002220102212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21220102220011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220102220041) 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 5 ways as a sum of consecutive naturals, for example, 12615993345 + ... + 12615995026.

Almost surely, 2^{21220102220011} is an apocalyptic number.

21220102220011 is a deficient number, since it is larger than the sum of its proper divisors (756959652001).

21220102220011 is an equidigital number, since it uses as much as digits as its factorization.

21220102220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25231988429 (or 25231988400 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220102220011 its reverse (11002220102212), we get a palindrome (32222322322223).

The spelling of 21220102220011 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred twenty thousand, eleven".