1321320120036 has 48 divisors (see below), whose sum is σ = 3539320909824. Its totient is φ = 375827114016.

The previous prime is 1321320119909. The next prime is 1321320120061. The reversal of 1321320120036 is 6300210231231.

It is a super-2 number, since 2×1321320120036² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321320119988 and 1321320120015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35250330 + ... + 35287793.

It is an arithmetic number, because the mean of its divisors is an integer number (73735852288).

Almost surely, 2^{1321320120036} is an apocalyptic number.

It is an amenable number.

1321320120036 is an abundant number, since it is smaller than the sum of its proper divisors (2218000789788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321320120036 is a wasteful number, since it uses less digits than its factorization.

1321320120036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70538360 (or 70538358 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1321320120036 its reverse (6300210231231), we get a palindrome (7621530351267).

The spelling of 1321320120036 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred twenty thousand, thirty-six".