31321123032103 has 4 divisors (see below), whose sum is σ = 31350981110400. Its totient is φ = 31291264953808.

The previous prime is 31321123032029. The next prime is 31321123032109. The reversal of 31321123032103 is 30123032112313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321123032103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321123032109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14929037575 + ... + 14929039672.

It is an arithmetic number, because the mean of its divisors is an integer number (7837745277600).

Almost surely, 2^{31321123032103} is an apocalyptic number.

31321123032103 is a deficient number, since it is larger than the sum of its proper divisors (29858078297).

31321123032103 is a wasteful number, since it uses less digits than its factorization.

31321123032103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29858078296.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31321123032103 its reverse (30123032112313), we get a palindrome (61444155144416).

The spelling of 31321123032103 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twenty-three million, thirty-two thousand, one hundred three".