1021055455523 has 8 divisors (see below), whose sum is σ = 1138018464720. Its totient is φ = 910414771200.

The previous prime is 1021055455499. The next prime is 1021055455627. The reversal of 1021055455523 is 3255545501201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021055455523 - 2²⁶ = 1020988346659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021055455223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1580580878 + ... + 1580581523.

It is an arithmetic number, because the mean of its divisors is an integer number (142252308090).

Almost surely, 2^{1021055455523} is an apocalyptic number.

1021055455523 is a deficient number, since it is larger than the sum of its proper divisors (116963009197).

1021055455523 is a wasteful number, since it uses less digits than its factorization.

1021055455523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161162437.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 1021055455523 in words is "one trillion, twenty-one billion, fifty-five million, four hundred fifty-five thousand, five hundred twenty-three".