31303121223103 has 2 divisors, whose sum is σ = 31303121223104. Its totient is φ = 31303121223102.

The previous prime is 31303121223089. The next prime is 31303121223131. The reversal of 31303121223103 is 30132212130313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31303121223103 - 2¹⁷ = 31303121092031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31303121223203) 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, 15651560611551 + 15651560611552.

It is an arithmetic number, because the mean of its divisors is an integer number (15651560611552).

Almost surely, 2^{31303121223103} is an apocalyptic number.

31303121223103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303121223103 is an equidigital number, since it uses as much as digits as its factorization.

31303121223103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31303121223103 its reverse (30132212130313), we get a palindrome (61435333353416).

The spelling of 31303121223103 in words is "thirty-one trillion, three hundred three billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred three".