12011222111 has 8 divisors (see below), whose sum is σ = 13746698784. Its totient is φ = 10280642400.

The previous prime is 12011222107. The next prime is 12011222129. The reversal of 12011222111 is 11122211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12011222111 - 2² = 12011222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011222711) 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, 1218980 + ... + 1228793.

It is an arithmetic number, because the mean of its divisors is an integer number (1718337348).

Almost surely, 2^12011222111 is an apocalyptic number.

12011222111 is a deficient number, since it is larger than the sum of its proper divisors (1735476673).

12011222111 is an equidigital number, since it uses as much as digits as its factorization.

12011222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448481.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12011222111 its reverse (11122211021), we get a palindrome (23133433132).

The spelling of 12011222111 in words is "twelve billion, eleven million, two hundred twenty-two thousand, one hundred eleven".