12101122111 has 16 divisors (see below), whose sum is σ = 13262463648. Its totient is φ = 10973174400.

The previous prime is 12101122091. The next prime is 12101122133. The reversal of 12101122111 is 11122110121.

It is a happy number.

12101122111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12101122111 - 2¹³ = 12101113919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101122091 and 12101122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101122151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641760 + ... + 660346.

It is an arithmetic number, because the mean of its divisors is an integer number (828903978).

Almost surely, 2^12101122111 is an apocalyptic number.

12101122111 is a deficient number, since it is larger than the sum of its proper divisors (1161341537).

12101122111 is a wasteful number, since it uses less digits than its factorization.

12101122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19482.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12101122111 its reverse (11122110121), we get a palindrome (23223232232).

The spelling of 12101122111 in words is "twelve billion, one hundred one million, one hundred twenty-two thousand, one hundred eleven".