1161201015171 has 12 divisors (see below), whose sum is σ = 1679318528472. Its totient is φ = 773197930176.

The previous prime is 1161201015167. The next prime is 1161201015181. The reversal of 1161201015171 is 1715101021611.

1161201015171 is a `hidden beast` number, since 1 + 16 + 120 + 10 + 1 + 517 + 1 = 666.

It is not a de Polignac number, because 1161201015171 - 2² = 1161201015167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161201015181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77998806 + ... + 78013691.

It is an arithmetic number, because the mean of its divisors is an integer number (139943210706).

Almost surely, 2^{1161201015171} is an apocalyptic number.

1161201015171 is a deficient number, since it is larger than the sum of its proper divisors (518117513301).

1161201015171 is a wasteful number, since it uses less digits than its factorization.

1161201015171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156013330 (or 156013327 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 27.

Adding to 1161201015171 its reverse (1715101021611), we get a palindrome (2876302036782).

The spelling of 1161201015171 in words is "one trillion, one hundred sixty-one billion, two hundred one million, fifteen thousand, one hundred seventy-one".