1320861807122 has 54 divisors (see below), whose sum is σ = 2358607765941. Its totient is φ = 554110230960.

The previous prime is 1320861807113. The next prime is 1320861807211. The reversal of 1320861807122 is 2217081680231.

It can be written as a sum of positive squares in 2 ways, for example, as 1129375923841 + 191485883281 = 1062721^2 + 437591^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=812669.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320861807122.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 232420493 + ... + 232426175.

Almost surely, 2^{1320861807122} is an apocalyptic number.

1320861807122 is a deficient number, since it is larger than the sum of its proper divisors (1037745958819).

1320861807122 is an frugal number, since it uses more digits than its factorization.

1320861807122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416 (or 5709 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 1320861807122 in words is "one trillion, three hundred twenty billion, eight hundred sixty-one million, eight hundred seven thousand, one hundred twenty-two".