1031321040431 has 4 divisors (see below), whose sum is σ = 1125077498664. Its totient is φ = 937564582200.

The previous prime is 1031321040419. The next prime is 1031321040439. The reversal of 1031321040431 is 1340401231301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1031321040431 - 2¹⁰ = 1031321039407 is a prime.

It is a super-2 number, since 2×1031321040431² (a number of 25 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 = 1031321040397 and 1031321040406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031321040439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46878229100 + ... + 46878229121.

It is an arithmetic number, because the mean of its divisors is an integer number (281269374666).

Almost surely, 2^{1031321040431} is an apocalyptic number.

1031321040431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1031321040431 is a deficient number, since it is larger than the sum of its proper divisors (93756458233).

1031321040431 is an equidigital number, since it uses as much as digits as its factorization.

1031321040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93756458232.

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

Adding to 1031321040431 its reverse (1340401231301), we get a palindrome (2371722271732).

The spelling of 1031321040431 in words is "one trillion, thirty-one billion, three hundred twenty-one million, forty thousand, four hundred thirty-one".