20112021222011 has 4 divisors (see below), whose sum is σ = 21295081293912. Its totient is φ = 18928961150112.

The previous prime is 20112021222001. The next prime is 20112021222019. The reversal of 20112021222011 is 11022212021102.

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 20112021222011 - 2¹⁰ = 20112021220987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1183060071883 = 20112021222011 / (2 + 0 + 1 + 1 + 2 + 0 + 2 + 1 + 2 + 2 + 2 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112021222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591530035925 + ... + 591530035958.

It is an arithmetic number, because the mean of its divisors is an integer number (5323770323478).

Almost surely, 2^{20112021222011} is an apocalyptic number.

20112021222011 is a deficient number, since it is larger than the sum of its proper divisors (1183060071901).

20112021222011 is a wasteful number, since it uses less digits than its factorization.

20112021222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183060071900.

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

Adding to 20112021222011 its reverse (11022212021102), we get a palindrome (31134233243113).

The spelling of 20112021222011 in words is "twenty trillion, one hundred twelve billion, twenty-one million, two hundred twenty-two thousand, eleven".