1321144011431 has 4 divisors (see below), whose sum is σ = 1321146937992. Its totient is φ = 1321141084872.

The previous prime is 1321144011409. The next prime is 1321144011437. The reversal of 1321144011431 is 1341104411231.

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 1321144011431 - 2³⁸ = 1046266104487 is a prime.

It is a super-2 number, since 2×1321144011431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321144011431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321144011437) 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, 626705 + ... + 1742138.

It is an arithmetic number, because the mean of its divisors is an integer number (330286734498).

Almost surely, 2^{1321144011431} is an apocalyptic number.

1321144011431 is a deficient number, since it is larger than the sum of its proper divisors (2926561).

1321144011431 is an equidigital number, since it uses as much as digits as its factorization.

1321144011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926560.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 1321144011431 its reverse (1341104411231), we get a palindrome (2662248422662).

The spelling of 1321144011431 in words is "one trillion, three hundred twenty-one billion, one hundred forty-four million, eleven thousand, four hundred thirty-one".