203311131321 has 64 divisors (see below), whose sum is σ = 319489228800. Its totient is φ = 114101913600.

The previous prime is 203311131301. The next prime is 203311131323. The reversal of 203311131321 is 123131113302.

It is a happy number.

It is not a de Polignac number, because 203311131321 - 2²⁵ = 203277576889 is a prime.

It is a super-2 number, since 2×203311131321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203311131323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1149060 + ... + 1314138.

It is an arithmetic number, because the mean of its divisors is an integer number (4992019200).

Almost surely, 2^203311131321 is an apocalyptic number.

It is an amenable number.

203311131321 is a deficient number, since it is larger than the sum of its proper divisors (116178097479).

203311131321 is a wasteful number, since it uses less digits than its factorization.

203311131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165190.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 203311131321 its reverse (123131113302), we get a palindrome (326442244623).

The spelling of 203311131321 in words is "two hundred three billion, three hundred eleven million, one hundred thirty-one thousand, three hundred twenty-one".