31301120103 has 48 divisors (see below), whose sum is σ = 49885405920. Its totient is φ = 17371791360.

The previous prime is 31301120089. The next prime is 31301120111. The reversal of 31301120103 is 30102110313.

It is a de Polignac number, because none of the positive numbers 2^k-31301120103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301120153) 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 in 47 ways as a sum of consecutive naturals, for example, 159783 + ... + 296871.

It is an arithmetic number, because the mean of its divisors is an integer number (1039279290).

Almost surely, 2^31301120103 is an apocalyptic number.

31301120103 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31301120103 is a deficient number, since it is larger than the sum of its proper divisors (18584285817).

31301120103 is a wasteful number, since it uses less digits than its factorization.

31301120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137168 (or 137157 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31301120103 its reverse (30102110313), we get a palindrome (61403230416).

The spelling of 31301120103 in words is "thirty-one billion, three hundred one million, one hundred twenty thousand, one hundred three".