2161530011 has 2 divisors, whose sum is σ = 2161530012. Its totient is φ = 2161530010.

The previous prime is 2161529939. The next prime is 2161530013. The reversal of 2161530011 is 1100351612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161530011 is a prime.

Together with 2161530013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2161530013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080765005 + 1080765006.

It is an arithmetic number, because the mean of its divisors is an integer number (1080765006).

Almost surely, 2^2161530011 is an apocalyptic number.

2161530011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161530011 is an equidigital number, since it uses as much as digits as its factorization.

2161530011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2161530011 is about 46492.2575382181. The cubic root of 2161530011 is about 1292.9659557580.

Adding to 2161530011 its reverse (1100351612), we get a palindrome (3261881623).

The spelling of 2161530011 in words is "two billion, one hundred sixty-one million, five hundred thirty thousand, eleven".