12000121111 has 8 divisors (see below), whose sum is σ = 13513333248. Its totient is φ = 10557291000.

The previous prime is 12000121079. The next prime is 12000121123. The reversal of 12000121111 is 11112100021.

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 12000121111 - 2⁵ = 12000121079 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 (12000121141) 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, 17595145 + ... + 17595826.

It is an arithmetic number, because the mean of its divisors is an integer number (1689166656).

Almost surely, 2^12000121111 is an apocalyptic number.

12000121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12000121111 is a deficient number, since it is larger than the sum of its proper divisors (1513212137).

12000121111 is a wasteful number, since it uses less digits than its factorization.

12000121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35191013.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12000121111 its reverse (11112100021), we get a palindrome (23112221132).

The spelling of 12000121111 in words is "twelve billion, one hundred twenty-one thousand, one hundred eleven".