20112122112111 has 24 divisors (see below), whose sum is σ = 29543862426000. Its totient is φ = 13180543731072.

The previous prime is 20112122112097. The next prime is 20112122112143. The reversal of 20112122112111 is 11121122121102.

It is a happy number.

20112122112111 is a `hidden beast` number, since 20 + 11 + 212 + 211 + 211 + 1 = 666.

It is not a de Polignac number, because 20112122112111 - 2¹¹ = 20112122110063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112122112161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26057595 + ... + 26818323.

It is an arithmetic number, because the mean of its divisors is an integer number (1230994267750).

Almost surely, 2^{20112122112111} is an apocalyptic number.

20112122112111 is a deficient number, since it is larger than the sum of its proper divisors (9431740313889).

20112122112111 is a wasteful number, since it uses less digits than its factorization.

20112122112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810583 (or 810580 counting only the distinct ones).

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

Adding to 20112122112111 its reverse (11121122121102), we get a palindrome (31233244233213).

The spelling of 20112122112111 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twelve thousand, one hundred eleven".