31123311203 has 2 divisors, whose sum is σ = 31123311204. Its totient is φ = 31123311202.

The previous prime is 31123311181. The next prime is 31123311269. The reversal of 31123311203 is 30211332113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31123311203 - 2¹⁶ = 31123245667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31123311283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561655601 + 15561655602.

It is an arithmetic number, because the mean of its divisors is an integer number (15561655602).

Almost surely, 2^31123311203 is an apocalyptic number.

31123311203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123311203 is an equidigital number, since it uses as much as digits as its factorization.

31123311203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31123311203 its reverse (30211332113), we get a palindrome (61334643316).

The spelling of 31123311203 in words is "thirty-one billion, one hundred twenty-three million, three hundred eleven thousand, two hundred three".