2131022161 has 2 divisors, whose sum is σ = 2131022162. Its totient is φ = 2131022160.

The previous prime is 2131022123. The next prime is 2131022183. The reversal of 2131022161 is 1612201312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2108554561 + 22467600 = 45919^2 + 4740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131022161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131022561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065511080 + 1065511081.

It is an arithmetic number, because the mean of its divisors is an integer number (1065511081).

Almost surely, 2^2131022161 is an apocalyptic number.

It is an amenable number.

2131022161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131022161 is an equidigital number, since it uses as much as digits as its factorization.

2131022161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2131022161 is about 46162.9955808762. The cubic root of 2131022161 is about 1286.8541339224.

Adding to 2131022161 its reverse (1612201312), we get a palindrome (3743223473).

The spelling of 2131022161 in words is "two billion, one hundred thirty-one million, twenty-two thousand, one hundred sixty-one".