1091828382021 has 20 divisors (see below), whose sum is σ = 1756464654252. Its totient is φ = 671894388288.

The previous prime is 1091828382013. The next prime is 1091828382173. The reversal of 1091828382021 is 1202838281901.

It can be written as a sum of positive squares in 2 ways, for example, as 446906957121 + 644921424900 = 668511^2 + 803070^2 .

It is not a de Polignac number, because 1091828382021 - 2³ = 1091828382013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091828382011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 518435976 + ... + 518438081.

Almost surely, 2^{1091828382021} is an apocalyptic number.

It is an amenable number.

1091828382021 is a deficient number, since it is larger than the sum of its proper divisors (664636272231).

1091828382021 is a wasteful number, since it uses less digits than its factorization.

1091828382021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036874082 (or 1036874073 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 1091828382021 in words is "one trillion, ninety-one billion, eight hundred twenty-eight million, three hundred eighty-two thousand, twenty-one".