1320421535552 has 56 divisors (see below), whose sum is σ = 3097787007360. Its totient is φ = 546381319680.

The previous prime is 1320421535539. The next prime is 1320421535569. The reversal of 1320421535552 is 2555351240231.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

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, 50803724 + ... + 50829707.

Almost surely, 2^{1320421535552} is an apocalyptic number.

It is an amenable number.

1320421535552 is an abundant number, since it is smaller than the sum of its proper divisors (1777365471808).

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

1320421535552 is a wasteful number, since it uses less digits than its factorization.

1320421535552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101633479 (or 101633469 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 1320421535552 its reverse (2555351240231), we get a palindrome (3875772775783).

The spelling of 1320421535552 in words is "one trillion, three hundred twenty billion, four hundred twenty-one million, five hundred thirty-five thousand, five hundred fifty-two".