203131123000 has 64 divisors (see below), whose sum is σ = 511890462720. Its totient is φ = 75002256000.

The previous prime is 203131122967. The next prime is 203131123009. The reversal of 203131123000 is 321131302.

It is a super-2 number, since 2×203131123000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203131123009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7799736 + ... + 7825735.

It is an arithmetic number, because the mean of its divisors is an integer number (7998288480).

Almost surely, 2^203131123000 is an apocalyptic number.

203131123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203131123000 is an abundant number, since it is smaller than the sum of its proper divisors (308759339720).

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

203131123000 is a wasteful number, since it uses less digits than its factorization.

203131123000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15625505 (or 15625491 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 203131123000 its reverse (321131302), we get a palindrome (203452254302).

The spelling of 203131123000 in words is "two hundred three billion, one hundred thirty-one million, one hundred twenty-three thousand".