12111121121011 has 12 divisors (see below), whose sum is σ = 13349305494000. Its totient is φ = 10979441240240.

The previous prime is 12111121120957. The next prime is 12111121121023. The reversal of 12111121121011 is 11012112111121.

It is not a de Polignac number, because 12111121121011 - 2¹¹ = 12111121118963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111121121611) 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, 139360336 + ... + 139447213.

It is an arithmetic number, because the mean of its divisors is an integer number (1112442124500).

Almost surely, 2^{12111121121011} is an apocalyptic number.

12111121121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111121121011 is a deficient number, since it is larger than the sum of its proper divisors (1238184372989).

12111121121011 is a wasteful number, since it uses less digits than its factorization.

12111121121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278807930 (or 278807919 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12111121121011 its reverse (11012112111121), we get a palindrome (23123233232132).

The spelling of 12111121121011 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".