20021220000011 has 4 divisors (see below), whose sum is σ = 20047255397400. Its totient is φ = 19995184602624.

The previous prime is 20021219999947. The next prime is 20021220000097. The reversal of 20021220000011 is 11000002212002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20021220000011 - 2⁶ = 20021219999947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021219999947 and 20021220000001.

It is not an unprimeable number, because it can be changed into a prime (20021220080011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13017697541 + ... + 13017699078.

It is an arithmetic number, because the mean of its divisors is an integer number (5011813849350).

Almost surely, 2^{20021220000011} is an apocalyptic number.

20021220000011 is a deficient number, since it is larger than the sum of its proper divisors (26035397389).

20021220000011 is an equidigital number, since it uses as much as digits as its factorization.

20021220000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26035397388.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021220000011 its reverse (11000002212002), we get a palindrome (31021222212013).

The spelling of 20021220000011 in words is "twenty trillion, twenty-one billion, two hundred twenty million, eleven", and thus it is an aban number.