20111112122109 has 8 divisors (see below), whose sum is σ = 26814899818560. Its totient is φ = 13407366253536.

The previous prime is 20111112122051. The next prime is 20111112122111. The reversal of 20111112122109 is 90122121111102.

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

It is not a de Polignac number, because 20111112122109 - 2⁷ = 20111112121981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111112124109) 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, 9317344 + ... + 11270985.

It is an arithmetic number, because the mean of its divisors is an integer number (3351862477320).

Almost surely, 2^{20111112122109} is an apocalyptic number.

It is an amenable number.

20111112122109 is a deficient number, since it is larger than the sum of its proper divisors (6703787696451).

20111112122109 is a wasteful number, since it uses less digits than its factorization.

20111112122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20913939.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 20111112122109 in words is "twenty trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, one hundred nine".