1321299406601 has 16 divisors (see below), whose sum is σ = 1417288492800. Its totient is φ = 1228583746368.

The previous prime is 1321299406507. The next prime is 1321299406667. The reversal of 1321299406601 is 1066049921231.

It is a cyclic number.

It is not a de Polignac number, because 1321299406601 - 2¹⁰ = 1321299405577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321299406201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243740 + ... + 1643778.

It is an arithmetic number, because the mean of its divisors is an integer number (88580530800).

Almost surely, 2^{1321299406601} is an apocalyptic number.

It is an amenable number.

1321299406601 is a deficient number, since it is larger than the sum of its proper divisors (95989086199).

1321299406601 is a wasteful number, since it uses less digits than its factorization.

1321299406601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401208.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 1321299406601 in words is "one trillion, three hundred twenty-one billion, two hundred ninety-nine million, four hundred six thousand, six hundred one".