12101112011 has 4 divisors (see below), whose sum is σ = 12101469552. Its totient is φ = 12100754472.

The previous prime is 12101111963. The next prime is 12101112041. The reversal of 12101112011 is 11021110121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021110121 = 7 ⋅1574444303.

It is a cyclic number.

It is not a de Polignac number, because 12101112011 - 2⁶ = 12101111947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101111983 and 12101112001.

It is not an unprimeable number, because it can be changed into a prime (12101112041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121991 + ... + 197696.

It is an arithmetic number, because the mean of its divisors is an integer number (3025367388).

Almost surely, 2^12101112011 is an apocalyptic number.

12101112011 is a deficient number, since it is larger than the sum of its proper divisors (357541).

12101112011 is an equidigital number, since it uses as much as digits as its factorization.

12101112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357540.

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

Adding to 12101112011 its reverse (11021110121), we get a palindrome (23122222132).

The spelling of 12101112011 in words is "twelve billion, one hundred one million, one hundred twelve thousand, eleven".