12111011211 has 32 divisors (see below), whose sum is σ = 18092720128. Its totient is φ = 7155630720.

The previous prime is 12111011201. The next prime is 12111011221. The reversal of 12111011211 is 11211011121.

It is an interprime number because it is at equal distance from previous prime (12111011201) and next prime (12111011221).

It is not a de Polignac number, because 12111011211 - 2⁷ = 12111011083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111011201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114105 + ... + 192981.

It is an arithmetic number, because the mean of its divisors is an integer number (565397504).

Almost surely, 2^12111011211 is an apocalyptic number.

12111011211 is a deficient number, since it is larger than the sum of its proper divisors (5981708917).

12111011211 is a wasteful number, since it uses less digits than its factorization.

12111011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79051.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12111011211 its reverse (11211011121), we get a palindrome (23322022332).

The spelling of 12111011211 in words is "twelve billion, one hundred eleven million, eleven thousand, two hundred eleven".