31203112103 has 4 divisors (see below), whose sum is σ = 31203466368. Its totient is φ = 31202757840.

The previous prime is 31203112051. The next prime is 31203112133. The reversal of 31203112103 is 30121130213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30121130213 = 17 ⋅1771831189.

It is a cyclic number.

It is not a de Polignac number, because 31203112103 - 2³⁰ = 30129370279 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 (31203112133) 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, 68858 + ... + 259128.

It is an arithmetic number, because the mean of its divisors is an integer number (7800866592).

Almost surely, 2^31203112103 is an apocalyptic number.

31203112103 is a deficient number, since it is larger than the sum of its proper divisors (354265).

31203112103 is a wasteful number, since it uses less digits than its factorization.

31203112103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354264.

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

Adding to 31203112103 its reverse (30121130213), we get a palindrome (61324242316).

The spelling of 31203112103 in words is "thirty-one billion, two hundred three million, one hundred twelve thousand, one hundred three".