12001111111121 has 8 divisors (see below), whose sum is σ = 13092484579104. Its totient is φ = 10909798204320.

The previous prime is 12001111111109. The next prime is 12001111111139. The reversal of 12001111111121 is 12111111110021.

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 12001111111121 - 2⁶ = 12001111111057 is a prime.

It is a super-3 number, since 3×12001111111121³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001111111096 and 12001111111105.

It is not an unprimeable number, because it can be changed into a prime (12001111111151) 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, 14725451 + ... + 15519056.

It is an arithmetic number, because the mean of its divisors is an integer number (1636560572388).

Almost surely, 2^{12001111111121} is an apocalyptic number.

12001111111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001111111121 is a deficient number, since it is larger than the sum of its proper divisors (1091373467983).

12001111111121 is a wasteful number, since it uses less digits than its factorization.

12001111111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30280591.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 12001111111121 its reverse (12111111110021), we get a palindrome (24112222221142).

The spelling of 12001111111121 in words is "twelve trillion, one billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-one".