203130123231 has 24 divisors (see below), whose sum is σ = 315881662464. Its totient is φ = 115771257840.

The previous prime is 203130123211. The next prime is 203130123233. The reversal of 203130123231 is 132321031302.

It is not a de Polignac number, because 203130123231 - 2¹⁷ = 203129992159 is a prime.

It is a super-2 number, since 2×203130123231² (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 = 203130123198 and 203130123207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203130123233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1747665 + ... + 1860266.

It is an arithmetic number, because the mean of its divisors is an integer number (13161735936).

Almost surely, 2^203130123231 is an apocalyptic number.

203130123231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

203130123231 is a deficient number, since it is larger than the sum of its proper divisors (112751539233).

203130123231 is a wasteful number, since it uses less digits than its factorization.

203130123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608331 (or 3608324 counting only the distinct ones).

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

Adding to 203130123231 its reverse (132321031302), we get a palindrome (335451154533).

The spelling of 203130123231 in words is "two hundred three billion, one hundred thirty million, one hundred twenty-three thousand, two hundred thirty-one".