21010220220011 has 8 divisors (see below), whose sum is σ = 22925943259200. Its totient is φ = 19095447684040.

The previous prime is 21010220220001. The next prime is 21010220220013. The reversal of 21010220220011 is 11002202201012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010220220011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010220220013) 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, 237579581 + ... + 237667998.

It is an arithmetic number, because the mean of its divisors is an integer number (2865742907400).

Almost surely, 2^{21010220220011} is an apocalyptic number.

21010220220011 is a deficient number, since it is larger than the sum of its proper divisors (1915723039189).

21010220220011 is a wasteful number, since it uses less digits than its factorization.

21010220220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475251609.

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

Adding to 21010220220011 its reverse (11002202201012), we get a palindrome (32012422421023).

The spelling of 21010220220011 in words is "twenty-one trillion, ten billion, two hundred twenty million, two hundred twenty thousand, eleven".