12211201111 has 8 divisors (see below), whose sum is σ = 12421090800. Its totient is φ = 12002124288.

The previous prime is 12211201097. The next prime is 12211201117. The reversal of 12211201111 is 11110211221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12211201111 - 2¹⁹ = 12210676823 is a prime.

It is a super-2 number, since 2×12211201111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211201091 and 12211201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211201117) 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, 172876 + ... + 233041.

It is an arithmetic number, because the mean of its divisors is an integer number (1552636350).

Almost surely, 2^12211201111 is an apocalyptic number.

12211201111 is a deficient number, since it is larger than the sum of its proper divisors (209889689).

12211201111 is an equidigital number, since it uses as much as digits as its factorization.

12211201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406433.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12211201111 its reverse (11110211221), we get a palindrome (23321412332).

The spelling of 12211201111 in words is "twelve billion, two hundred eleven million, two hundred one thousand, one hundred eleven".