12101111111 has 8 divisors (see below), whose sum is σ = 12125513904. Its totient is φ = 12076732800.

The previous prime is 12101111107. The next prime is 12101111117. The reversal of 12101111111 is 11111110121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12101111111 - 2² = 12101111107 is a prime.

It is a Duffinian number.

12101111111 is a modest number, since divided by 111111 gives 12101 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12101111092 and 12101111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101111117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217261 + ... + 1227161.

It is an arithmetic number, because the mean of its divisors is an integer number (1515689238).

Almost surely, 2^12101111111 is an apocalyptic number.

12101111111 is a deficient number, since it is larger than the sum of its proper divisors (24402793).

12101111111 is an equidigital number, since it uses as much as digits as its factorization.

12101111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12241.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 12101111111 its reverse (11111110121), we get a palindrome (23212221232).

The spelling of 12101111111 in words is "twelve billion, one hundred one million, one hundred eleven thousand, one hundred eleven".