12101321111 has 16 divisors (see below), whose sum is σ = 13504081920. Its totient is φ = 10751590080.

The previous prime is 12101321077. The next prime is 12101321117. The reversal of 12101321111 is 11112310121.

It is not a de Polignac number, because 12101321111 - 2¹⁰ = 12101320087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101321117) 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, 28955 + ... + 158243.

It is an arithmetic number, because the mean of its divisors is an integer number (844005120).

Almost surely, 2^12101321111 is an apocalyptic number.

12101321111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12101321111 is a deficient number, since it is larger than the sum of its proper divisors (1402760809).

12101321111 is a wasteful number, since it uses less digits than its factorization.

12101321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129494.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12101321111 its reverse (11112310121), we get a palindrome (23213631232).

The spelling of 12101321111 in words is "twelve billion, one hundred one million, three hundred twenty-one thousand, one hundred eleven".