1191511703213 has 16 divisors (see below), whose sum is σ = 1285167985920. Its totient is φ = 1098142180416.

The previous prime is 1191511703153. The next prime is 1191511703219. The reversal of 1191511703213 is 3123071151911.

It is a cyclic number.

It is not a de Polignac number, because 1191511703213 - 2²⁰ = 1191510654637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191511703219) 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 in 15 ways as a sum of consecutive naturals, for example, 40080431 + ... + 40110147.

It is an arithmetic number, because the mean of its divisors is an integer number (80322999120).

Almost surely, 2^{1191511703213} is an apocalyptic number.

1191511703213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1191511703213 is a deficient number, since it is larger than the sum of its proper divisors (93656282707).

1191511703213 is a wasteful number, since it uses less digits than its factorization.

1191511703213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34436.

The product of its (nonzero) digits is 5670, while the sum is 35.

The spelling of 1191511703213 in words is "one trillion, one hundred ninety-one billion, five hundred eleven million, seven hundred three thousand, two hundred thirteen".