12101120111 has 16 divisors (see below), whose sum is σ = 13128369408. Its totient is φ = 11124062400.

The previous prime is 12101120093. The next prime is 12101120123. The reversal of 12101120111 is 11102110121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101120111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101120092 and 12101120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101120191) 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, 32585 + ... + 158946.

It is an arithmetic number, because the mean of its divisors is an integer number (820523088).

Almost surely, 2^12101120111 is an apocalyptic number.

12101120111 is a deficient number, since it is larger than the sum of its proper divisors (1027249297).

12101120111 is a wasteful number, since it uses less digits than its factorization.

12101120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191662.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12101120111 its reverse (11102110121), we get a palindrome (23203230232).

The spelling of 12101120111 in words is "twelve billion, one hundred one million, one hundred twenty thousand, one hundred eleven".