31120103 has 16 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 25430496.

The previous prime is 31120091. The next prime is 31120109. The reversal of 31120103 is 30102113.

It is not a de Polignac number, because 31120103 - 2⁶ = 31120039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120109) 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 15 ways as a sum of consecutive naturals, for example, 15926 + ... + 17772.

It is an arithmetic number, because the mean of its divisors is an integer number (2328480).

Almost surely, 2^31120103 is an apocalyptic number.

31120103 is a deficient number, since it is larger than the sum of its proper divisors (6135577).

31120103 is a wasteful number, since it uses less digits than its factorization.

31120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31120103 is about 5578.5395042072. The cubic root of 31120103 is about 314.5432298024.

Adding to 31120103 its reverse (30102113), we get a palindrome (61222216).

The spelling of 31120103 in words is "thirty-one million, one hundred twenty thousand, one hundred three".