1001011801189 has 2 divisors, whose sum is σ = 1001011801190. Its totient is φ = 1001011801188.

The previous prime is 1001011801187. The next prime is 1001011801213. The reversal of 1001011801189 is 9811081101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869490976225 + 131520824964 = 932465^2 + 362658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001011801189 - 2¹ = 1001011801187 is a prime.

It is a super-2 number, since 2×1001011801189² (a number of 25 digits) contains 22 as substring.

Together with 1001011801187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1001011801189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001011801187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500505900594 + 500505900595.

It is an arithmetic number, because the mean of its divisors is an integer number (500505900595).

Almost surely, 2^{1001011801189} is an apocalyptic number.

It is an amenable number.

1001011801189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001011801189 is an equidigital number, since it uses as much as digits as its factorization.

1001011801189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 31.

The spelling of 1001011801189 in words is "one trillion, one billion, eleven million, eight hundred one thousand, one hundred eighty-nine".