20111111220211 has 8 divisors (see below), whose sum is σ = 21939437716848. Its totient is φ = 18282792000000.

The previous prime is 20111111220203. The next prime is 20111111220217. The reversal of 20111111220211 is 11202211111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20111111220211 - 2³ = 20111111220203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111111220217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5106211 + ... + 8142211.

It is an arithmetic number, because the mean of its divisors is an integer number (2742429714606).

Almost surely, 2^{20111111220211} is an apocalyptic number.

20111111220211 is a deficient number, since it is larger than the sum of its proper divisors (1828326496637).

20111111220211 is a wasteful number, since it uses less digits than its factorization.

20111111220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638213.

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

Adding to 20111111220211 its reverse (11202211111102), we get a palindrome (31313322331313).

The spelling of 20111111220211 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty thousand, two hundred eleven".