20111101122111 has 4 divisors (see below), whose sum is σ = 26814801496152. Its totient is φ = 13407400748072.

The previous prime is 20111101122071. The next prime is 20111101122121. The reversal of 20111101122111 is 11122110111102.

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 20111101122111 - 2⁹ = 20111101121599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111101122121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351850187016 + ... + 3351850187021.

It is an arithmetic number, because the mean of its divisors is an integer number (6703700374038).

Almost surely, 2^{20111101122111} is an apocalyptic number.

20111101122111 is a deficient number, since it is larger than the sum of its proper divisors (6703700374041).

20111101122111 is an equidigital number, since it uses as much as digits as its factorization.

20111101122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703700374040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20111101122111 its reverse (11122110111102), we get a palindrome (31233211233213).

The spelling of 20111101122111 in words is "twenty trillion, one hundred eleven billion, one hundred one million, one hundred twenty-two thousand, one hundred eleven".