31120113203 has 2 divisors, whose sum is σ = 31120113204. Its totient is φ = 31120113202.

The previous prime is 31120113197. The next prime is 31120113253. The reversal of 31120113203 is 30231102113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120113203 - 2⁶ = 31120113139 is a prime.

It is a super-2 number, since 2×31120113203² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31120113253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560056601 + 15560056602.

It is an arithmetic number, because the mean of its divisors is an integer number (15560056602).

Almost surely, 2^31120113203 is an apocalyptic number.

31120113203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120113203 is an equidigital number, since it uses as much as digits as its factorization.

31120113203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31120113203 its reverse (30231102113), we get a palindrome (61351215316).

The spelling of 31120113203 in words is "thirty-one billion, one hundred twenty million, one hundred thirteen thousand, two hundred three".