1111161161 has 8 divisors (see below), whose sum is σ = 1213186464. Its totient is φ = 1009304320.

The previous prime is 1111161143. The next prime is 1111161199. The reversal of 1111161161 is 1611611111.

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 1111161161 - 2²² = 1106966857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111161661) 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, 28115 + ... + 54888.

It is an arithmetic number, because the mean of its divisors is an integer number (151648308).

Almost surely, 2^1111161161 is an apocalyptic number.

1111161161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111161161 is a deficient number, since it is larger than the sum of its proper divisors (102025303).

1111161161 is a wasteful number, since it uses less digits than its factorization.

1111161161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84231.

The product of its digits is 36, while the sum is 20.

The square root of 1111161161 is about 33334.0840732125. The cubic root of 1111161161 is about 1035.7597200820.

Adding to 1111161161 its reverse (1611611111), we get a palindrome (2722772272).

The spelling of 1111161161 in words is "one billion, one hundred eleven million, one hundred sixty-one thousand, one hundred sixty-one".