1320131161 has 16 divisors (see below), whose sum is σ = 1414361088. Its totient is φ = 1229113600.

The previous prime is 1320131143. The next prime is 1320131171. The reversal of 1320131161 is 1611310231.

It is a cyclic number.

It is not a de Polignac number, because 1320131161 - 2¹⁵ = 1320098393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320131171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489960 + ... + 492646.

It is an arithmetic number, because the mean of its divisors is an integer number (88397568).

Almost surely, 2^1320131161 is an apocalyptic number.

It is an amenable number.

1320131161 is a deficient number, since it is larger than the sum of its proper divisors (94229927).

1320131161 is a wasteful number, since it uses less digits than its factorization.

1320131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1320131161 is about 36333.6092481878. The cubic root of 1320131161 is about 1096.9976422485.

Adding to 1320131161 its reverse (1611310231), we get a palindrome (2931441392).

The spelling of 1320131161 in words is "one billion, three hundred twenty million, one hundred thirty-one thousand, one hundred sixty-one".