31103123000 has 64 divisors (see below), whose sum is σ = 73014570720. Its totient is φ = 12401376000.

The previous prime is 31103122993. The next prime is 31103123011. The reversal of 31103123000 is 32130113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263315 + ... + 362685.

Almost surely, 2^31103123000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31103123000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36507285360).

31103123000 is an abundant number, since it is smaller than the sum of its proper divisors (41911447720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103123000 is a wasteful number, since it uses less digits than its factorization.

31103123000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99705 (or 99691 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31103123000 its reverse (32130113), we get a palindrome (31135253113).

The spelling of 31103123000 in words is "thirty-one billion, one hundred three million, one hundred twenty-three thousand".