31223320110121 has 2 divisors, whose sum is σ = 31223320110122. Its totient is φ = 31223320110120.

The previous prime is 31223320110091. The next prime is 31223320110137. The reversal of 31223320110121 is 12101102332213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22890138884496 + 8333181225625 = 4784364^2 + 2886725^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223320110121 - 2⁹ = 31223320109609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31223320110092 and 31223320110101.

It is not a weakly prime, because it can be changed into another prime (31223320111121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611660055060 + 15611660055061.

It is an arithmetic number, because the mean of its divisors is an integer number (15611660055061).

Almost surely, 2^{31223320110121} is an apocalyptic number.

It is an amenable number.

31223320110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223320110121 is an equidigital number, since it uses as much as digits as its factorization.

31223320110121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31223320110121 its reverse (12101102332213), we get a palindrome (43324422442334).

The spelling of 31223320110121 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred twenty million, one hundred ten thousand, one hundred twenty-one".