20111112122211 has 12 divisors (see below), whose sum is σ = 31690237283640. Its totient is φ = 12188552801280.

The previous prime is 20111112122203. The next prime is 20111112122243. The reversal of 20111112122211 is 11222121111102.

It is a happy number.

20111112122211 is a `hidden beast` number, since 201 + 111 + 121 + 22 + 211 = 666.

It is not a de Polignac number, because 20111112122211 - 2³ = 20111112122203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111112122291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101571273246 + ... + 101571273443.

It is an arithmetic number, because the mean of its divisors is an integer number (2640853106970).

Almost surely, 2^{20111112122211} is an apocalyptic number.

20111112122211 is a deficient number, since it is larger than the sum of its proper divisors (11579125161429).

20111112122211 is a wasteful number, since it uses less digits than its factorization.

20111112122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203142546706 (or 203142546703 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 20111112122211 its reverse (11222121111102), we get a palindrome (31333233233313).

The spelling of 20111112122211 in words is "twenty trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, two hundred eleven".