2131320077 has 2 divisors, whose sum is σ = 2131320078. Its totient is φ = 2131320076.

The previous prime is 2131320067. The next prime is 2131320119. The reversal of 2131320077 is 7700231312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215289321 + 916030756 = 34861^2 + 30266^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131320077 - 2²⁴ = 2114542861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131320067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065660038 + 1065660039.

It is an arithmetic number, because the mean of its divisors is an integer number (1065660039).

Almost surely, 2^2131320077 is an apocalyptic number.

It is an amenable number.

2131320077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131320077 is an equidigital number, since it uses as much as digits as its factorization.

2131320077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 2131320077 is about 46166.2222517719. Note that the first 4 decimals coincide. The cubic root of 2131320077 is about 1286.9140983501.

Adding to 2131320077 its reverse (7700231312), we get a palindrome (9831551389).

The spelling of 2131320077 in words is "two billion, one hundred thirty-one million, three hundred twenty thousand, seventy-seven".