21322020011 has 4 divisors (see below), whose sum is σ = 21622330224. Its totient is φ = 21021709800.

The previous prime is 21322019987. The next prime is 21322020053. The reversal of 21322020011 is 11002022312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21322020011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322020911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150155000 + ... + 150155141.

It is an arithmetic number, because the mean of its divisors is an integer number (5405582556).

Almost surely, 2^21322020011 is an apocalyptic number.

21322020011 is a deficient number, since it is larger than the sum of its proper divisors (300310213).

21322020011 is an equidigital number, since it uses as much as digits as its factorization.

21322020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300310212.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21322020011 its reverse (11002022312), we get a palindrome (32324042323).

The spelling of 21322020011 in words is "twenty-one billion, three hundred twenty-two million, twenty thousand, eleven".