12111211211 has 8 divisors (see below), whose sum is σ = 13907611200. Its totient is φ = 10430708040.

The previous prime is 12111211201. The next prime is 12111211289. The reversal of 12111211211 is 11211211121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111211211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111211201) 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, 28973981 + ... + 28974398.

It is an arithmetic number, because the mean of its divisors is an integer number (1738451400).

Almost surely, 2^12111211211 is an apocalyptic number.

12111211211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111211211 is a deficient number, since it is larger than the sum of its proper divisors (1796399989).

12111211211 is a wasteful number, since it uses less digits than its factorization.

12111211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57948409.

The product of its digits is 8, while the sum is 14.

Adding to 12111211211 its reverse (11211211121), we get a palindrome (23322422332).

It can be divided in two parts, 12111 and 211211, that added together give a palindrome (223322).

The spelling of 12111211211 in words is "twelve billion, one hundred eleven million, two hundred eleven thousand, two hundred eleven".