12111210121111 has 8 divisors (see below), whose sum is σ = 12286455296544. Its totient is φ = 11936094522240.

The previous prime is 12111210121097. The next prime is 12111210121117. The reversal of 12111210121111 is 11112101211121.

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 12111210121111 - 2¹³ = 12111210112919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111210121117) 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, 32205846 + ... + 32579731.

It is an arithmetic number, because the mean of its divisors is an integer number (1535806912068).

Almost surely, 2^{12111210121111} is an apocalyptic number.

12111210121111 is a deficient number, since it is larger than the sum of its proper divisors (175245175433).

12111210121111 is an equidigital number, since it uses as much as digits as its factorization.

12111210121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64788281.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12111210121111 its reverse (11112101211121), we get a palindrome (23223311332232).

It can be divided in two parts, 1 and 2111210121111, that added together give a palindrome (2111210121112).

The spelling of 12111210121111 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".