1011320161 has 12 divisors (see below), whose sum is σ = 1081210624. Its totient is φ = 944924400.

The previous prime is 1011320117. The next prime is 1011320179. The reversal of 1011320161 is 1610231101.

It is not a de Polignac number, because 1011320161 - 2¹⁵ = 1011287393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011320111) 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, 6676 + ... + 45466.

Almost surely, 2^1011320161 is an apocalyptic number.

It is an amenable number.

1011320161 is a deficient number, since it is larger than the sum of its proper divisors (69890463).

1011320161 is an equidigital number, since it uses as much as digits as its factorization.

1011320161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38880 (or 38851 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1011320161 is about 31801.2603681049. The cubic root of 1011320161 is about 1003.7592374256.

Adding to 1011320161 its reverse (1610231101), we get a palindrome (2621551262).

The spelling of 1011320161 in words is "one billion, eleven million, three hundred twenty thousand, one hundred sixty-one".