1021305505055 has 32 divisors (see below), whose sum is σ = 1415736569088. Its totient is φ = 699021683200.

The previous prime is 1021305505039. The next prime is 1021305505057. The reversal of 1021305505055 is 5505055031201.

It is not a de Polignac number, because 1021305505055 - 2⁴ = 1021305505039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021305505057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15011144 + ... + 15079026.

It is an arithmetic number, because the mean of its divisors is an integer number (44241767784).

Almost surely, 2^{1021305505055} is an apocalyptic number.

1021305505055 is a deficient number, since it is larger than the sum of its proper divisors (394431064033).

1021305505055 is a wasteful number, since it uses less digits than its factorization.

1021305505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84007.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 1021305505055 in words is "one trillion, twenty-one billion, three hundred five million, five hundred five thousand, fifty-five".