1001120002081 has 2 divisors, whose sum is σ = 1001120002082. Its totient is φ = 1001120002080.

The previous prime is 1001120002067. The next prime is 1001120002109. The reversal of 1001120002081 is 1802000211001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997921081600 + 3198920481 = 998960^2 + 56559^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001120002081 - 2²¹ = 1001117904929 is a prime.

It is a super-2 number, since 2×1001120002081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001120002781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500560001040 + 500560001041.

It is an arithmetic number, because the mean of its divisors is an integer number (500560001041).

Almost surely, 2^{1001120002081} is an apocalyptic number.

It is an amenable number.

1001120002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001120002081 is an equidigital number, since it uses as much as digits as its factorization.

1001120002081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1001120002081 its reverse (1802000211001), we get a palindrome (2803120213082).

The spelling of 1001120002081 in words is "one trillion, one billion, one hundred twenty million, two thousand, eighty-one".