31312022322121 has 2 divisors, whose sum is σ = 31312022322122. Its totient is φ = 31312022322120.

The previous prime is 31312022322103. The next prime is 31312022322239. The reversal of 31312022322121 is 12122322021313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30599704890000 + 712317432121 = 5531700^2 + 843989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312022322121 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312025322121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656011161060 + 15656011161061.

It is an arithmetic number, because the mean of its divisors is an integer number (15656011161061).

Almost surely, 2^{31312022322121} is an apocalyptic number.

It is an amenable number.

31312022322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312022322121 is an equidigital number, since it uses as much as digits as its factorization.

31312022322121 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 31312022322121 its reverse (12122322021313), we get a palindrome (43434344343434).

The spelling of 31312022322121 in words is "thirty-one trillion, three hundred twelve billion, twenty-two million, three hundred twenty-two thousand, one hundred twenty-one".