1021159357056 has 128 divisors (see below), whose sum is σ = 3014208120000. Its totient is φ = 340344695808.

The previous prime is 1021159357037. The next prime is 1021159357079. The reversal of 1021159357056 is 6507539511201.

1021159357056 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 1 + 593 + 5 + 7 + 0 + 56 = 666.

1021159357056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

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, 42769890 + ... + 42793758.

Almost surely, 2^{1021159357056} is an apocalyptic number.

1021159357056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1021159357056 is an abundant number, since it is smaller than the sum of its proper divisors (1993048762944).

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

1021159357056 is a wasteful number, since it uses less digits than its factorization.

1021159357056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36271 (or 36253 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The spelling of 1021159357056 in words is "one trillion, twenty-one billion, one hundred fifty-nine million, three hundred fifty-seven thousand, fifty-six".