31123313103 has 8 divisors (see below), whose sum is σ = 41511600000. Its totient is φ = 20741950808.

The previous prime is 31123313099. The next prime is 31123313141. The reversal of 31123313103 is 30131332113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31123313103 - 2² = 31123313099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31123313103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123313153) 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 7 ways as a sum of consecutive naturals, for example, 1720653 + ... + 1738646.

It is an arithmetic number, because the mean of its divisors is an integer number (5188950000).

Almost surely, 2^31123313103 is an apocalyptic number.

31123313103 is a deficient number, since it is larger than the sum of its proper divisors (10388286897).

31123313103 is a wasteful number, since it uses less digits than its factorization.

31123313103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462301.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31123313103 its reverse (30131332113), we get a palindrome (61254645216).

The spelling of 31123313103 in words is "thirty-one billion, one hundred twenty-three million, three hundred thirteen thousand, one hundred three".