31103103123 has 12 divisors (see below), whose sum is σ = 44961738120. Its totient is φ = 20719232736.

The previous prime is 31103103103. The next prime is 31103103127. The reversal of 31103103123 is 32130130113.

It is a happy number.

31103103123 is a `hidden beast` number, since 31 + 10 + 310 + 312 + 3 = 666.

It is not a de Polignac number, because 31103103123 - 2¹⁴ = 31103086739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31103103096 and 31103103105.

It is not an unprimeable number, because it can be changed into a prime (31103103127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1335258 + ... + 1358351.

It is an arithmetic number, because the mean of its divisors is an integer number (3746811510).

Almost surely, 2^31103103123 is an apocalyptic number.

31103103123 is a deficient number, since it is larger than the sum of its proper divisors (13858634997).

31103103123 is a wasteful number, since it uses less digits than its factorization.

31103103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694898 (or 2694895 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31103103123 its reverse (32130130113), we get a palindrome (63233233236).

The spelling of 31103103123 in words is "thirty-one billion, one hundred three million, one hundred three thousand, one hundred twenty-three".