1321322328460 has 24 divisors (see below), whose sum is σ = 2781561202560. Its totient is φ = 527236681344.

The previous prime is 1321322328439. The next prime is 1321322328499. The reversal of 1321322328460 is 648232231231.

It is a super-2 number, since 2×1321322328460² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80757244 + ... + 80773603.

It is an arithmetic number, because the mean of its divisors is an integer number (115898383440).

Almost surely, 2^{1321322328460} is an apocalyptic number.

1321322328460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321322328460 is an abundant number, since it is smaller than the sum of its proper divisors (1460238874100).

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

1321322328460 is a wasteful number, since it uses less digits than its factorization.

1321322328460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161531265 (or 161531263 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 1321322328460 its reverse (648232231231), we get a palindrome (1969554559691).

The spelling of 1321322328460 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, three hundred twenty-eight thousand, four hundred sixty".