2321172255761 has 2 divisors, whose sum is σ = 2321172255762. Its totient is φ = 2321172255760.

The previous prime is 2321172255697. The next prime is 2321172255791. The reversal of 2321172255761 is 1675522711232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2308257297025 + 12914958736 = 1519295^2 + 113644^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321172255761 - 2⁶ = 2321172255697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2321172255791) 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, 1160586127880 + 1160586127881.

It is an arithmetic number, because the mean of its divisors is an integer number (1160586127881).

Almost surely, 2^{2321172255761} is an apocalyptic number.

It is an amenable number.

2321172255761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321172255761 is an equidigital number, since it uses as much as digits as its factorization.

2321172255761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 44.

Adding to 2321172255761 its reverse (1675522711232), we get a palindrome (3996694966993).

The spelling of 2321172255761 in words is "two trillion, three hundred twenty-one billion, one hundred seventy-two million, two hundred fifty-five thousand, seven hundred sixty-one".