1321411440409 has 2 divisors, whose sum is σ = 1321411440410. Its totient is φ = 1321411440408.

The previous prime is 1321411440403. The next prime is 1321411440509. The reversal of 1321411440409 is 9040441141231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905390310400 + 416021130009 = 951520^2 + 644997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321411440409 - 2³⁷ = 1183972486937 is a prime.

It is a super-2 number, since 2×1321411440409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321411440403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660705720204 + 660705720205.

It is an arithmetic number, because the mean of its divisors is an integer number (660705720205).

Almost surely, 2^{1321411440409} is an apocalyptic number.

It is an amenable number.

1321411440409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321411440409 is an equidigital number, since it uses as much as digits as its factorization.

1321411440409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 1321411440409 in words is "one trillion, three hundred twenty-one billion, four hundred eleven million, four hundred forty thousand, four hundred nine".