12001111122031 has 2 divisors, whose sum is σ = 12001111122032. Its totient is φ = 12001111122030.

The previous prime is 12001111122017. The next prime is 12001111122079. The reversal of 12001111122031 is 13022111110021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001111122031 - 2²³ = 12001102733423 is a prime.

It is a super-2 number, since 2×12001111122031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12001111121996 and 12001111122014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001111122331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000555561015 + 6000555561016.

It is an arithmetic number, because the mean of its divisors is an integer number (6000555561016).

Almost surely, 2^{12001111122031} is an apocalyptic number.

12001111122031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001111122031 is an equidigital number, since it uses as much as digits as its factorization.

12001111122031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12001111122031 its reverse (13022111110021), we get a palindrome (25023222232052).

The spelling of 12001111122031 in words is "twelve trillion, one billion, one hundred eleven million, one hundred twenty-two thousand, thirty-one".