203123130231 has 16 divisors (see below), whose sum is σ = 309528396800. Its totient is φ = 116067571488.

The previous prime is 203123130193. The next prime is 203123130251. The reversal of 203123130231 is 132031321302.

It is not a de Polignac number, because 203123130231 - 2¹⁰ = 203123129207 is a prime.

It is a super-2 number, since 2×203123130231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 203123130198 and 203123130207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203123130251) 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, 1051665 + ... + 1229733.

It is an arithmetic number, because the mean of its divisors is an integer number (19345524800).

Almost surely, 2^203123130231 is an apocalyptic number.

203123130231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

203123130231 is a deficient number, since it is larger than the sum of its proper divisors (106405266569).

203123130231 is a wasteful number, since it uses less digits than its factorization.

203123130231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232398.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 203123130231 its reverse (132031321302), we get a palindrome (335154451533).

The spelling of 203123130231 in words is "two hundred three billion, one hundred twenty-three million, one hundred thirty thousand, two hundred thirty-one".