203411312321 has 16 divisors (see below), whose sum is σ = 246156744960. Its totient is φ = 164088545280.

The previous prime is 203411312281. The next prime is 203411312327. The reversal of 203411312321 is 123213114302.

It is a cyclic number.

It is not a de Polignac number, because 203411312321 - 2⁶ = 203411312257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203411312327) 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, 4441025 + ... + 4486593.

It is an arithmetic number, because the mean of its divisors is an integer number (15384796560).

Almost surely, 2^203411312321 is an apocalyptic number.

It is an amenable number.

203411312321 is a deficient number, since it is larger than the sum of its proper divisors (42745432639).

203411312321 is a wasteful number, since it uses less digits than its factorization.

203411312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83104.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203411312321 its reverse (123213114302), we get a palindrome (326624426623).

The spelling of 203411312321 in words is "two hundred three billion, four hundred eleven million, three hundred twelve thousand, three hundred twenty-one".