203123321012 has 12 divisors (see below), whose sum is σ = 355605831840. Its totient is φ = 101521654776.

The previous prime is 203123321003. The next prime is 203123321029. The reversal of 203123321012 is 210123321302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9990008 + ... + 10010319.

It is an arithmetic number, because the mean of its divisors is an integer number (29633819320).

Almost surely, 2^203123321012 is an apocalyptic number.

It is an amenable number.

203123321012 is a deficient number, since it is larger than the sum of its proper divisors (152482510828).

203123321012 is a wasteful number, since it uses less digits than its factorization.

203123321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002870 (or 20002868 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203123321012 its reverse (210123321302), we get a palindrome (413246642314).

The spelling of 203123321012 in words is "two hundred three billion, one hundred twenty-three million, three hundred twenty-one thousand, twelve".