1170557105221 has 24 divisors (see below), whose sum is σ = 1345180987584. Its totient is φ = 997813217280.

The previous prime is 1170557105183. The next prime is 1170557105233. The reversal of 1170557105221 is 1225017550711.

It is not a de Polignac number, because 1170557105221 - 2²⁷ = 1170422887493 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170557105021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462486726 + ... + 462489256.

It is an arithmetic number, because the mean of its divisors is an integer number (56049207816).

Almost surely, 2^{1170557105221} is an apocalyptic number.

It is an amenable number.

1170557105221 is a deficient number, since it is larger than the sum of its proper divisors (174623882363).

1170557105221 is an equidigital number, since it uses as much as digits as its factorization.

1170557105221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221 (or 3988 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 37.

The spelling of 1170557105221 in words is "one trillion, one hundred seventy billion, five hundred fifty-seven million, one hundred five thousand, two hundred twenty-one".