203123042012 has 96 divisors (see below), whose sum is σ = 425074184640. Its totient is φ = 83836928000.

The previous prime is 203123041993. The next prime is 203123042021. The reversal of 203123042012 is 210240321302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37329212 + ... + 37334652.

It is an arithmetic number, because the mean of its divisors is an integer number (4427856090).

Almost surely, 2^203123042012 is an apocalyptic number.

203123042012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

203123042012 is an abundant number, since it is smaller than the sum of its proper divisors (221951142628).

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

203123042012 is a wasteful number, since it uses less digits than its factorization.

203123042012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223 (or 7221 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203123042012 its reverse (210240321302), we get a palindrome (413363363314).

The spelling of 203123042012 in words is "two hundred three billion, one hundred twenty-three million, forty-two thousand, twelve".