12101111011 has 8 divisors (see below), whose sum is σ = 13202020800. Its totient is φ = 11000336040.

The previous prime is 12101110991. The next prime is 12101111017. The reversal of 12101111011 is 11011110121.

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 12101111011 - 2⁵ = 12101110979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101111017) 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, 285300 + ... + 324958.

It is an arithmetic number, because the mean of its divisors is an integer number (1650252600).

Almost surely, 2^12101111011 is an apocalyptic number.

12101111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12101111011 is a deficient number, since it is larger than the sum of its proper divisors (1100909789).

12101111011 is a wasteful number, since it uses less digits than its factorization.

12101111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67409.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 12101111011 its reverse (11011110121), we get a palindrome (23112221132).

It can be divided in two parts, 1 and 2101111011, that added together give a palindrome (2101111012).

The spelling of 12101111011 in words is "twelve billion, one hundred one million, one hundred eleven thousand, eleven".