1321011120320 has 28 divisors (see below), whose sum is σ = 3145657731024. Its totient is φ = 528404448000.

The previous prime is 1321011120301. The next prime is 1321011120379. The reversal of 1321011120320 is 230211101231.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064079556 + ... + 2064080195.

Almost surely, 2^{1321011120320} is an apocalyptic number.

1321011120320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321011120320 is an abundant number, since it is smaller than the sum of its proper divisors (1824646610704).

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

1321011120320 is an equidigital number, since it uses as much as digits as its factorization.

1321011120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128159768 (or 4128159758 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1321011120320 its reverse (230211101231), we get a palindrome (1551222221551).

The spelling of 1321011120320 in words is "one trillion, three hundred twenty-one billion, eleven million, one hundred twenty thousand, three hundred twenty".