1321172246573 has 2 divisors, whose sum is σ = 1321172246574. Its totient is φ = 1321172246572.

The previous prime is 1321172246567. The next prime is 1321172246599. The reversal of 1321172246573 is 3756422711231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124104616644 + 197067629929 = 1060238^2 + 443923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321172246573 - 2⁴ = 1321172246557 is a prime.

It is a super-2 number, since 2×1321172246573² (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 (1321172246533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660586123286 + 660586123287.

It is an arithmetic number, because the mean of its divisors is an integer number (660586123287).

Almost surely, 2^{1321172246573} is an apocalyptic number.

It is an amenable number.

1321172246573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321172246573 is an equidigital number, since it uses as much as digits as its factorization.

1321172246573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The spelling of 1321172246573 in words is "one trillion, three hundred twenty-one billion, one hundred seventy-two million, two hundred forty-six thousand, five hundred seventy-three".