321040135350431 has 128 divisors (see below), whose sum is σ = 411912670740480. Its totient is φ = 243942189926400.

The previous prime is 321040135350427. The next prime is 321040135350469. The reversal of 321040135350431 is 134053531040123.

It is not a de Polignac number, because 321040135350431 - 2² = 321040135350427 is a prime.

It is a super-2 number, since 2×321040135350431² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321040135350391 and 321040135350400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321040135350731) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5929896560 + ... + 5929950698.

It is an arithmetic number, because the mean of its divisors is an integer number (3218067740160).

Almost surely, 2^{321040135350431} is an apocalyptic number.

321040135350431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

321040135350431 is a deficient number, since it is larger than the sum of its proper divisors (90872535390049).

321040135350431 is a wasteful number, since it uses less digits than its factorization.

321040135350431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54565.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 321040135350431 its reverse (134053531040123), we get a palindrome (455093666390554).

The spelling of 321040135350431 in words is "three hundred twenty-one trillion, forty billion, one hundred thirty-five million, three hundred fifty thousand, four hundred thirty-one".