312221022073 has 2 divisors, whose sum is σ = 312221022074. Its totient is φ = 312221022072.

The previous prime is 312221022023. The next prime is 312221022083. The reversal of 312221022073 is 370220122213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275511611664 + 36709410409 = 524892^2 + 191597^2 .

It is a cyclic number.

It is not a de Polignac number, because 312221022073 - 2¹⁷ = 312220891001 is a prime.

It is not a weakly prime, because it can be changed into another prime (312221022013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110511036 + 156110511037.

It is an arithmetic number, because the mean of its divisors is an integer number (156110511037).

Almost surely, 2^312221022073 is an apocalyptic number.

It is an amenable number.

312221022073 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221022073 is an equidigital number, since it uses as much as digits as its factorization.

312221022073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 312221022073 its reverse (370220122213), we get a palindrome (682441144286).

The spelling of 312221022073 in words is "three hundred twelve billion, two hundred twenty-one million, twenty-two thousand, seventy-three".