20201220020011 has 4 divisors (see below), whose sum is σ = 20201422819024. Its totient is φ = 20201017221000.

The previous prime is 20201220019993. The next prime is 20201220020021. The reversal of 20201220020011 is 11002002210202.

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-20201220020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201220019973 and 20201220020000.

It is not an unprimeable number, because it can be changed into a prime (20201220020021) 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, 101250015 + ... + 101449336.

It is an arithmetic number, because the mean of its divisors is an integer number (5050355704756).

Almost surely, 2^{20201220020011} is an apocalyptic number.

20201220020011 is a deficient number, since it is larger than the sum of its proper divisors (202799013).

20201220020011 is an equidigital number, since it uses as much as digits as its factorization.

20201220020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202799012.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20201220020011 its reverse (11002002210202), we get a palindrome (31203222230213).

The spelling of 20201220020011 in words is "twenty trillion, two hundred one billion, two hundred twenty million, twenty thousand, eleven".