20012122221011 has 4 divisors (see below), whose sum is σ = 20021936898000. Its totient is φ = 20002307544024.

The previous prime is 20012122220989. The next prime is 20012122221019. The reversal of 20012122221011 is 11012222121002.

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 20012122221011 - 2⁶ = 20012122220947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012122221019) 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, 4907335436 + ... + 4907339513.

It is an arithmetic number, because the mean of its divisors is an integer number (5005484224500).

Almost surely, 2^{20012122221011} is an apocalyptic number.

20012122221011 is a deficient number, since it is larger than the sum of its proper divisors (9814676989).

20012122221011 is an equidigital number, since it uses as much as digits as its factorization.

20012122221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9814676988.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20012122221011 its reverse (11012222121002), we get a palindrome (31024344342013).

The spelling of 20012122221011 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, eleven".