320123001202261 has 2 divisors, whose sum is σ = 320123001202262. Its totient is φ = 320123001202260.

The previous prime is 320123001202189. The next prime is 320123001202267. The reversal of 320123001202261 is 162202100321023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241901252580625 + 78221748621636 = 15553175^2 + 8844306^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123001202261 - 2²³ = 320122992813653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320123001202267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061500601130 + 160061500601131.

It is an arithmetic number, because the mean of its divisors is an integer number (160061500601131).

Almost surely, 2^{320123001202261} is an apocalyptic number.

It is an amenable number.

320123001202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123001202261 is an equidigital number, since it uses as much as digits as its factorization.

320123001202261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 320123001202261 its reverse (162202100321023), we get a palindrome (482325101523284).

The spelling of 320123001202261 in words is "three hundred twenty trillion, one hundred twenty-three billion, one million, two hundred two thousand, two hundred sixty-one".