1123161161 has 8 divisors (see below), whose sum is σ = 1150453920. Its totient is φ = 1095921792.

The previous prime is 1123161121. The next prime is 1123161163. The reversal of 1123161161 is 1611613211.

It is a happy number.

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 1123161161 - 2²² = 1118966857 is a prime.

It is a super-2 number, since 2×1123161161² = 2522981987157735842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123161163) 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, 31001 + ... + 56633.

It is an arithmetic number, because the mean of its divisors is an integer number (143806740).

Almost surely, 2^1123161161 is an apocalyptic number.

It is an amenable number.

1123161161 is a deficient number, since it is larger than the sum of its proper divisors (27292759).

1123161161 is a wasteful number, since it uses less digits than its factorization.

1123161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26695.

The product of its digits is 216, while the sum is 23.

The square root of 1123161161 is about 33513.5966586697. The cubic root of 1123161161 is about 1039.4749448391.

Adding to 1123161161 its reverse (1611613211), we get a palindrome (2734774372).

The spelling of 1123161161 in words is "one billion, one hundred twenty-three million, one hundred sixty-one thousand, one hundred sixty-one".