1200112319981 has 2 divisors, whose sum is σ = 1200112319982. Its totient is φ = 1200112319980.

The previous prime is 1200112319969. The next prime is 1200112320013. The reversal of 1200112319981 is 1899132110021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1135524672100 + 64587647881 = 1065610^2 + 254141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200112319981 - 2²² = 1200108125677 is a prime.

It is a super-2 number, since 2×1200112319981² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200112319911) 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 as a sum of consecutive naturals, namely, 600056159990 + 600056159991.

It is an arithmetic number, because the mean of its divisors is an integer number (600056159991).

Almost surely, 2^{1200112319981} is an apocalyptic number.

It is an amenable number.

1200112319981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200112319981 is an equidigital number, since it uses as much as digits as its factorization.

1200112319981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 1200112319981 in words is "one trillion, two hundred billion, one hundred twelve million, three hundred nineteen thousand, nine hundred eighty-one".