20121101122111 has 16 divisors (see below), whose sum is σ = 22473786654720. Its totient is φ = 17857625338080.

The previous prime is 20121101122097. The next prime is 20121101122127. The reversal of 20121101122111 is 11122110112102.

It is not a de Polignac number, because 20121101122111 - 2¹⁵ = 20121101089343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121101122141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48811071 + ... + 49221568.

It is an arithmetic number, because the mean of its divisors is an integer number (1404611665920).

Almost surely, 2^{20121101122111} is an apocalyptic number.

20121101122111 is a deficient number, since it is larger than the sum of its proper divisors (2352685532609).

20121101122111 is a wasteful number, since it uses less digits than its factorization.

20121101122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98033094.

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

Adding to 20121101122111 its reverse (11122110112102), we get a palindrome (31243211234213).

The spelling of 20121101122111 in words is "twenty trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred eleven".