1191081509603 has 2 divisors, whose sum is σ = 1191081509604. Its totient is φ = 1191081509602.

The previous prime is 1191081509573. The next prime is 1191081509641. The reversal of 1191081509603 is 3069051801911.

It is a weak prime.

It is an emirp because it is prime and its reverse (3069051801911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1191081509603 - 2¹⁴ = 1191081493219 is a prime.

It is a super-2 number, since 2×1191081509603² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1191081509693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595540754801 + 595540754802.

It is an arithmetic number, because the mean of its divisors is an integer number (595540754802).

Almost surely, 2^{1191081509603} is an apocalyptic number.

1191081509603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191081509603 is an equidigital number, since it uses as much as digits as its factorization.

1191081509603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 1191081509603 in words is "one trillion, one hundred ninety-one billion, eighty-one million, five hundred nine thousand, six hundred three".