1001110109981 has 2 divisors, whose sum is σ = 1001110109982. Its totient is φ = 1001110109980.

The previous prime is 1001110109971. The next prime is 1001110110073. The reversal of 1001110109981 is 1899010111001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963283360900 + 37826749081 = 981470^2 + 194491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001110109981 is a prime.

It is a super-2 number, since 2×1001110109981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001110109971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500555054990 + 500555054991.

It is an arithmetic number, because the mean of its divisors is an integer number (500555054991).

Almost surely, 2^{1001110109981} is an apocalyptic number.

It is an amenable number.

1001110109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001110109981 is an equidigital number, since it uses as much as digits as its factorization.

1001110109981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 32.

The spelling of 1001110109981 in words is "one trillion, one billion, one hundred ten million, one hundred nine thousand, nine hundred eighty-one".