1165705221071 has 8 divisors (see below), whose sum is σ = 1168512984144. Its totient is φ = 1162900678720.

The previous prime is 1165705221029. The next prime is 1165705221091. The reversal of 1165705221071 is 1701225075611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165705221071 - 2³⁰ = 1164631479247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165705221091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79646 + ... + 1528971.

It is an arithmetic number, because the mean of its divisors is an integer number (146064123018).

Almost surely, 2^{1165705221071} is an apocalyptic number.

1165705221071 is a deficient number, since it is larger than the sum of its proper divisors (2807763073).

1165705221071 is a wasteful number, since it uses less digits than its factorization.

1165705221071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610361.

The product of its (nonzero) digits is 29400, while the sum is 38.

The spelling of 1165705221071 in words is "one trillion, one hundred sixty-five billion, seven hundred five million, two hundred twenty-one thousand, seventy-one".