12001212001111 has 8 divisors (see below), whose sum is σ = 12125004795344. Its totient is φ = 11877420614400.

The previous prime is 12001212001109. The next prime is 12001212001117. The reversal of 12001212001111 is 11110021210021.

It is a happy number.

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

It is not a de Polignac number, because 12001212001111 - 2¹ = 12001212001109 is a prime.

It is a super-2 number, since 2×12001212001111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001212001091 and 12001212001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001212001117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33184561 + ... + 33544261.

It is an arithmetic number, because the mean of its divisors is an integer number (1515625599418).

Almost surely, 2^{12001212001111} is an apocalyptic number.

12001212001111 is a deficient number, since it is larger than the sum of its proper divisors (123792794233).

12001212001111 is an equidigital number, since it uses as much as digits as its factorization.

12001212001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703761.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12001212001111 its reverse (11110021210021), we get a palindrome (23111233211132).

The spelling of 12001212001111 in words is "twelve trillion, one billion, two hundred twelve million, one thousand, one hundred eleven".