203402132321 has 16 divisors (see below), whose sum is σ = 225064376064. Its totient is φ = 183006829824.

The previous prime is 203402132309. The next prime is 203402132341. The reversal of 203402132321 is 123231204302.

It is a cyclic number.

It is not a de Polignac number, because 203402132321 - 2¹⁰ = 203402131297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203402132341) 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, 2925770 + ... + 2994483.

It is an arithmetic number, because the mean of its divisors is an integer number (14066523504).

Almost surely, 2^203402132321 is an apocalyptic number.

It is an amenable number.

203402132321 is a deficient number, since it is larger than the sum of its proper divisors (21662243743).

203402132321 is a wasteful number, since it uses less digits than its factorization.

203402132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920360.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 203402132321 its reverse (123231204302), we get a palindrome (326633336623).

The spelling of 203402132321 in words is "two hundred three billion, four hundred two million, one hundred thirty-two thousand, three hundred twenty-one".