203122401321 has 24 divisors (see below), whose sum is σ = 317937354240. Its totient is φ = 115005072672.

The previous prime is 203122401311. The next prime is 203122401343. The reversal of 203122401321 is 123104221302.

It is not a de Polignac number, because 203122401321 - 2¹⁷ = 203122270249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (203122401311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6322441 + ... + 6354486.

It is an arithmetic number, because the mean of its divisors is an integer number (13247389760).

Almost surely, 2^203122401321 is an apocalyptic number.

203122401321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

203122401321 is a deficient number, since it is larger than the sum of its proper divisors (114814952919).

203122401321 is a wasteful number, since it uses less digits than its factorization.

203122401321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12677053 (or 12677046 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 203122401321 its reverse (123104221302), we get a palindrome (326226622623).

The spelling of 203122401321 in words is "two hundred three billion, one hundred twenty-two million, four hundred one thousand, three hundred twenty-one".