12012111019999 has 4 divisors (see below), whose sum is σ = 12012142707360. Its totient is φ = 12012079332640.

The previous prime is 12012111019981. The next prime is 12012111020033. The reversal of 12012111019999 is 99991011121021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12012111019999 - 2¹⁷ = 12012110888927 is a prime.

It is a super-2 number, since 2×12012111019999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012111059999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15268087 + ... + 16035544.

It is an arithmetic number, because the mean of its divisors is an integer number (3003035676840).

Almost surely, 2^{12012111019999} is an apocalyptic number.

12012111019999 is a deficient number, since it is larger than the sum of its proper divisors (31687361).

12012111019999 is an equidigital number, since it uses as much as digits as its factorization.

12012111019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31687360.

The product of its (nonzero) digits is 26244, while the sum is 46.

The spelling of 12012111019999 in words is "twelve trillion, twelve billion, one hundred eleven million, nineteen thousand, nine hundred ninety-nine".