321203403020423 has 16 divisors (see below), whose sum is σ = 413379494799360. Its totient is φ = 242214547730400.

The previous prime is 321203403020411. The next prime is 321203403020429. The reversal of 321203403020423 is 324020304302123.

It is not a de Polignac number, because 321203403020423 - 2⁸ = 321203403020167 is a prime.

It is a super-2 number, since 2×321203403020423² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321203403020429) 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, 67281816428 + ... + 67281821201.

It is an arithmetic number, because the mean of its divisors is an integer number (25836218424960).

Almost surely, 2^{321203403020423} is an apocalyptic number.

321203403020423 is a deficient number, since it is larger than the sum of its proper divisors (92176091778937).

321203403020423 is a wasteful number, since it uses less digits than its factorization.

321203403020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134563637678.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 321203403020423 its reverse (324020304302123), we get a palindrome (645223707322546).

The spelling of 321203403020423 in words is "three hundred twenty-one trillion, two hundred three billion, four hundred three million, twenty thousand, four hundred twenty-three".