12111030121 has 8 divisors (see below), whose sum is σ = 13045261824. Its totient is φ = 11210770560.

The previous prime is 12111030073. The next prime is 12111030133. The reversal of 12111030121 is 12103011121.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-12111030121 is a prime.

It is a super-3 number, since 3×12111030121³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111030821) 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, 8492296 + ... + 8493721.

It is an arithmetic number, because the mean of its divisors is an integer number (1630657728).

Almost surely, 2^12111030121 is an apocalyptic number.

It is an amenable number.

12111030121 is a deficient number, since it is larger than the sum of its proper divisors (934231703).

12111030121 is a wasteful number, since it uses less digits than its factorization.

12111030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16986071.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111030121 its reverse (12103011121), we get a palindrome (24214041242).

The spelling of 12111030121 in words is "twelve billion, one hundred eleven million, thirty thousand, one hundred twenty-one".