31123002003 has 16 divisors (see below), whose sum is σ = 43687134720. Its totient is φ = 19654055136.

The previous prime is 31123001999. The next prime is 31123002007. The reversal of 31123002003 is 30020032113.

It is an interprime number because it is at equal distance from previous prime (31123001999) and next prime (31123002007).

It is not a de Polignac number, because 31123002003 - 2² = 31123001999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31123002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463126 + ... + 526052.

It is an arithmetic number, because the mean of its divisors is an integer number (2730445920).

Almost surely, 2^31123002003 is an apocalyptic number.

31123002003 is a deficient number, since it is larger than the sum of its proper divisors (12564132717).

31123002003 is a wasteful number, since it uses less digits than its factorization.

31123002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71626.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31123002003 its reverse (30020032113), we get a palindrome (61143034116).

The spelling of 31123002003 in words is "thirty-one billion, one hundred twenty-three million, two thousand, three".