1321444140431 has 2 divisors, whose sum is σ = 1321444140432. Its totient is φ = 1321444140430.

The previous prime is 1321444140427. The next prime is 1321444140439. The reversal of 1321444140431 is 1340414441231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321444140431 - 2² = 1321444140427 is a prime.

It is a super-2 number, since 2×1321444140431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321444140439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660722070215 + 660722070216.

It is an arithmetic number, because the mean of its divisors is an integer number (660722070216).

Almost surely, 2^{1321444140431} is an apocalyptic number.

1321444140431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321444140431 is an equidigital number, since it uses as much as digits as its factorization.

1321444140431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 1321444140431 its reverse (1340414441231), we get a palindrome (2661858581662).

The spelling of 1321444140431 in words is "one trillion, three hundred twenty-one billion, four hundred forty-four million, one hundred forty thousand, four hundred thirty-one".