31123221203 has 2 divisors, whose sum is σ = 31123221204. Its totient is φ = 31123221202.

The previous prime is 31123221193. The next prime is 31123221209. The reversal of 31123221203 is 30212232113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31123221203 - 2¹⁰ = 31123220179 is a prime.

It is not a weakly prime, because it can be changed into another prime (31123221209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561610601 + 15561610602.

It is an arithmetic number, because the mean of its divisors is an integer number (15561610602).

Almost surely, 2^31123221203 is an apocalyptic number.

31123221203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123221203 is an equidigital number, since it uses as much as digits as its factorization.

31123221203 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 20.

Adding to 31123221203 its reverse (30212232113), we get a palindrome (61335453316).

The spelling of 31123221203 in words is "thirty-one billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred three".