1121571605165 has 8 divisors (see below), whose sum is σ = 1468239192288. Its totient is φ = 815688440080.

The previous prime is 1121571605153. The next prime is 1121571605179. The reversal of 1121571605165 is 5615061751211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121571605165 - 2²² = 1121567410861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10196105447 + ... + 10196105556.

It is an arithmetic number, because the mean of its divisors is an integer number (183529899036).

Almost surely, 2^{1121571605165} is an apocalyptic number.

It is an amenable number.

1121571605165 is a deficient number, since it is larger than the sum of its proper divisors (346667587123).

1121571605165 is a wasteful number, since it uses less digits than its factorization.

1121571605165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20392211019.

The product of its (nonzero) digits is 63000, while the sum is 41.

The spelling of 1121571605165 in words is "one trillion, one hundred twenty-one billion, five hundred seventy-one million, six hundred five thousand, one hundred sixty-five".