12111021111121 has 8 divisors (see below), whose sum is σ = 12531916283040. Its totient is φ = 11696455190112.

The previous prime is 12111021111113. The next prime is 12111021111143. The reversal of 12111021111121 is 12111112011121.

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 12111021111121 - 2³ = 12111021111113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111021111095 and 12111021111104.

It is not an unprimeable number, because it can be changed into a prime (12111021411121) 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, 1582308835 + ... + 1582316488.

It is an arithmetic number, because the mean of its divisors is an integer number (1566489535380).

Almost surely, 2^{12111021111121} is an apocalyptic number.

It is an amenable number.

12111021111121 is a deficient number, since it is larger than the sum of its proper divisors (420895171919).

12111021111121 is an equidigital number, since it uses as much as digits as its factorization.

12111021111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164625455.

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

Adding to 12111021111121 its reverse (12111112011121), we get a palindrome (24222133122242).

The spelling of 12111021111121 in words is "twelve trillion, one hundred eleven billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".