312221022013 has 2 divisors, whose sum is σ = 312221022014. Its totient is φ = 312221022012.

The previous prime is 312221021971. The next prime is 312221022023. The reversal of 312221022013 is 310220122213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255416019769 + 56805002244 = 505387^2 + 238338^2 .

It is an emirp because it is prime and its reverse (310220122213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312221022013 - 2¹³ = 312221013821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312221022023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110511006 + 156110511007.

It is an arithmetic number, because the mean of its divisors is an integer number (156110511007).

Almost surely, 2^312221022013 is an apocalyptic number.

It is an amenable number.

312221022013 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221022013 is an equidigital number, since it uses as much as digits as its factorization.

312221022013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 312221022013 its reverse (310220122213), we get a palindrome (622441144226).

The spelling of 312221022013 in words is "three hundred twelve billion, two hundred twenty-one million, twenty-two thousand, thirteen".