12001231212111 has 24 divisors (see below), whose sum is σ = 18886981850640. Its totient is φ = 7530184285056.

The previous prime is 12001231212053. The next prime is 12001231212119. The reversal of 12001231212111 is 11121213210021.

It is a happy number.

12001231212111 is a `hidden beast` number, since 1 + 200 + 1 + 231 + 21 + 211 + 1 = 666.

It is not a de Polignac number, because 12001231212111 - 2¹⁴ = 12001231195727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001231212119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 769006116 + ... + 769021721.

It is an arithmetic number, because the mean of its divisors is an integer number (786957577110).

Almost surely, 2^{12001231212111} is an apocalyptic number.

12001231212111 is a deficient number, since it is larger than the sum of its proper divisors (6885750638529).

12001231212111 is a wasteful number, since it uses less digits than its factorization.

12001231212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538027880 (or 1538027857 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12001231212111 its reverse (11121213210021), we get a palindrome (23122444422132).

The spelling of 12001231212111 in words is "twelve trillion, one billion, two hundred thirty-one million, two hundred twelve thousand, one hundred eleven".