321240203431 has 12 divisors (see below), whose sum is σ = 378417810720. Its totient is φ = 271863315360.

The previous prime is 321240203419. The next prime is 321240203437. The reversal of 321240203431 is 134302042123.

It is not a de Polignac number, because 321240203431 - 2⁵ = 321240203399 is a prime.

It is a super-2 number, since 2×321240203431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321240203396 and 321240203405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321240203437) 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 11 ways as a sum of consecutive naturals, for example, 41489310 + ... + 41497051.

It is an arithmetic number, because the mean of its divisors is an integer number (31534817560).

Almost surely, 2^321240203431 is an apocalyptic number.

321240203431 is a deficient number, since it is larger than the sum of its proper divisors (57177607289).

321240203431 is an equidigital number, since it uses as much as digits as its factorization.

321240203431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82986454 (or 82986447 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 321240203431 its reverse (134302042123), we get a palindrome (455542245554).

The spelling of 321240203431 in words is "three hundred twenty-one billion, two hundred forty million, two hundred three thousand, four hundred thirty-one".