1171220503845 has 32 divisors (see below), whose sum is σ = 2142088704000. Its totient is φ = 535307999040.

The previous prime is 1171220503841. The next prime is 1171220503907. The reversal of 1171220503845 is 5483050221711.

It is not a de Polignac number, because 1171220503845 - 2² = 1171220503841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171220503841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 586845 + ... + 1639154.

It is an arithmetic number, because the mean of its divisors is an integer number (66940272000).

Almost surely, 2^{1171220503845} is an apocalyptic number.

1171220503845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1171220503845 is a deficient number, since it is larger than the sum of its proper divisors (970868200155).

1171220503845 is a wasteful number, since it uses less digits than its factorization.

1171220503845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231025.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 1171220503845 in words is "one trillion, one hundred seventy-one billion, two hundred twenty million, five hundred three thousand, eight hundred forty-five".