203123321293 has 16 divisors (see below), whose sum is σ = 215223224832. Its totient is φ = 191433960000.

The previous prime is 203123321257. The next prime is 203123321329. The reversal of 203123321293 is 392123321302.

It is an interprime number because it is at equal distance from previous prime (203123321257) and next prime (203123321329).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203123321293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203123321593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340771 + ... + 722752.

It is an arithmetic number, because the mean of its divisors is an integer number (13451451552).

Almost surely, 2^203123321293 is an apocalyptic number.

It is an amenable number.

203123321293 is a deficient number, since it is larger than the sum of its proper divisors (12099903539).

203123321293 is a wasteful number, since it uses less digits than its factorization.

203123321293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063716.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 203123321293 its reverse (392123321302), we get a palindrome (595246642595).

The spelling of 203123321293 in words is "two hundred three billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred ninety-three".