1331322240431 has 4 divisors (see below), whose sum is σ = 1331326590000. Its totient is φ = 1331317890864.

The previous prime is 1331322240389. The next prime is 1331322240463. The reversal of 1331322240431 is 1340422231331.

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 1331322240431 - 2¹⁰ = 1331322239407 is a prime.

It is a super-2 number, since 2×1331322240431² (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 = 1331322240394 and 1331322240403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331322440431) 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, 1677806 + ... + 2340443.

It is an arithmetic number, because the mean of its divisors is an integer number (332831647500).

Almost surely, 2^{1331322240431} is an apocalyptic number.

1331322240431 is a deficient number, since it is larger than the sum of its proper divisors (4349569).

1331322240431 is an equidigital number, since it uses as much as digits as its factorization.

1331322240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349568.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1331322240431 its reverse (1340422231331), we get a palindrome (2671744471762).

The spelling of 1331322240431 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, two hundred forty thousand, four hundred thirty-one".