12111221210011 has 16 divisors (see below), whose sum is σ = 15100023363840. Its totient is φ = 9437115854880.

The previous prime is 12111221209979. The next prime is 12111221210041. The reversal of 12111221210011 is 11001212211121.

It is not a de Polignac number, because 12111221210011 - 2⁵ = 12111221209979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111221210041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060800 + ... + 5335666.

It is an arithmetic number, because the mean of its divisors is an integer number (943751460240).

Almost surely, 2^{12111221210011} is an apocalyptic number.

12111221210011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111221210011 is a deficient number, since it is larger than the sum of its proper divisors (2988802153829).

12111221210011 is a wasteful number, since it uses less digits than its factorization.

12111221210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322914.

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

Adding to 12111221210011 its reverse (11001212211121), we get a palindrome (23112433421132).

It can be divided in two parts, 12111 and 221210011, that added together give a palindrome (221222122).

The spelling of 12111221210011 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, eleven".