1321405466243 has 2 divisors, whose sum is σ = 1321405466244. Its totient is φ = 1321405466242.

The previous prime is 1321405466237. The next prime is 1321405466341. The reversal of 1321405466243 is 3426645041231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321405466243 is a prime.

It is a super-2 number, since 2×1321405466243² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1321405466243.

It is not a weakly prime, because it can be changed into another prime (1321405766243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660702733121 + 660702733122.

It is an arithmetic number, because the mean of its divisors is an integer number (660702733122).

Almost surely, 2^{1321405466243} is an apocalyptic number.

1321405466243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321405466243 is an equidigital number, since it uses as much as digits as its factorization.

1321405466243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 1321405466243 in words is "one trillion, three hundred twenty-one billion, four hundred five million, four hundred sixty-six thousand, two hundred forty-three".