12211001111 has 32 divisors (see below), whose sum is σ = 13736952000. Its totient is φ = 10824155136.

The previous prime is 12211001083. The next prime is 12211001123. The reversal of 12211001111 is 11110011221.

It is a de Polignac number, because none of the positive numbers 2^k-12211001111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12211001092 and 12211001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211001191) 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, 23989925 + ... + 23990433.

It is an arithmetic number, because the mean of its divisors is an integer number (429279750).

Almost surely, 2^12211001111 is an apocalyptic number.

12211001111 is a deficient number, since it is larger than the sum of its proper divisors (1525950889).

12211001111 is an equidigital number, since it uses as much as digits as its factorization.

12211001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 802 counting only the distinct ones).

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

Adding to 12211001111 its reverse (11110011221), we get a palindrome (23321012332).

The spelling of 12211001111 in words is "twelve billion, two hundred eleven million, one thousand, one hundred eleven".