1321085085528 has 192 divisors, whose sum is σ = 3820214391840. Its totient is φ = 379188805632.

The previous prime is 1321085085527. The next prime is 1321085085533. The reversal of 1321085085528 is 8255805801231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321085085527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7706800 + ... + 7876352.

Almost surely, 2^{1321085085528} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321085085528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910107195920).

1321085085528 is an abundant number, since it is smaller than the sum of its proper divisors (2499129306312).

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

1321085085528 is a wasteful number, since it uses less digits than its factorization.

1321085085528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169718 (or 169701 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 48.

The spelling of 1321085085528 in words is "one trillion, three hundred twenty-one billion, eighty-five million, eighty-five thousand, five hundred twenty-eight".