12210111111 has 32 divisors (see below), whose sum is σ = 18313295616. Its totient is φ = 7171200000.

The previous prime is 12210111107. The next prime is 12210111157. The reversal of 12210111111 is 11111101221.

It is not a de Polignac number, because 12210111111 - 2² = 12210111107 is a prime.

12210111111 is a modest number, since divided by 111111 gives 12210 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210111101) 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, 286551 + ... + 326391.

It is an arithmetic number, because the mean of its divisors is an integer number (572290488).

Almost surely, 2^12210111111 is an apocalyptic number.

12210111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12210111111 is a deficient number, since it is larger than the sum of its proper divisors (6103184505).

12210111111 is a wasteful number, since it uses less digits than its factorization.

12210111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40143.

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

Adding to 12210111111 its reverse (11111101221), we get a palindrome (23321212332).

It can be divided in two parts, 12210 and 111111, that added together give a palindrome (123321).

The spelling of 12210111111 in words is "twelve billion, two hundred ten million, one hundred eleven thousand, one hundred eleven".