12011101211 has 4 divisors (see below), whose sum is σ = 12041356272. Its totient is φ = 11980846152.

The previous prime is 12011101183. The next prime is 12011101213. The reversal of 12011101211 is 11210111021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12011101211 - 2¹⁸ = 12010839067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011101192 and 12011101201.

It is not an unprimeable number, because it can be changed into a prime (12011101213) 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, 15126935 + ... + 15127728.

It is an arithmetic number, because the mean of its divisors is an integer number (3010339068).

Almost surely, 2^12011101211 is an apocalyptic number.

12011101211 is a deficient number, since it is larger than the sum of its proper divisors (30255061).

12011101211 is an equidigital number, since it uses as much as digits as its factorization.

12011101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255060.

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

Adding to 12011101211 its reverse (11210111021), we get a palindrome (23221212232).

The spelling of 12011101211 in words is "twelve billion, eleven million, one hundred one thousand, two hundred eleven".