203122231321 has 4 divisors (see below), whose sum is σ = 203123638144. Its totient is φ = 203120824500.

The previous prime is 203122231313. The next prime is 203122231339. The reversal of 203122231321 is 123132221302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203122231321 - 2³ = 203122231313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203122231292 and 203122231301.

It is not an unprimeable number, because it can be changed into a prime (203122231021) 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 3 ways as a sum of consecutive naturals, for example, 458385 + ... + 785086.

It is an arithmetic number, because the mean of its divisors is an integer number (50780909536).

Almost surely, 2^203122231321 is an apocalyptic number.

It is an amenable number.

203122231321 is a deficient number, since it is larger than the sum of its proper divisors (1406823).

203122231321 is a wasteful number, since it uses less digits than its factorization.

203122231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406822.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 203122231321 its reverse (123132221302), we get a palindrome (326254452623).

The spelling of 203122231321 in words is "two hundred three billion, one hundred twenty-two million, two hundred thirty-one thousand, three hundred twenty-one".