31123201103 has 4 divisors (see below), whose sum is σ = 31425368208. Its totient is φ = 30821034000.

The previous prime is 31123201091. The next prime is 31123201117. The reversal of 31123201103 is 30110232113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30110232113 = 13 ⋅2316171701.

It is a cyclic number.

It is not a de Polignac number, because 31123201103 - 2¹⁰ = 31123200079 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 (31123201003) 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, 151083398 + ... + 151083603.

It is an arithmetic number, because the mean of its divisors is an integer number (7856342052).

Almost surely, 2^31123201103 is an apocalyptic number.

31123201103 is a deficient number, since it is larger than the sum of its proper divisors (302167105).

31123201103 is a wasteful number, since it uses less digits than its factorization.

31123201103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302167104.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31123201103 its reverse (30110232113), we get a palindrome (61233433216).

The spelling of 31123201103 in words is "thirty-one billion, one hundred twenty-three million, two hundred one thousand, one hundred three".