1020504355105 has 16 divisors (see below), whose sum is σ = 1230051827664. Its totient is φ = 812774430720.

The previous prime is 1020504355009. The next prime is 1020504355139. The reversal of 1020504355105 is 5015534050201.

1020504355105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 285191245089 + 735313110016 = 534033^2 + 857504^2 .

It is not a de Polignac number, because 1020504355105 - 2¹³ = 1020504346913 is a prime.

It is a super-2 number, since 2×1020504355105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 3988597 + ... + 4236733.

It is an arithmetic number, because the mean of its divisors is an integer number (76878239229).

Almost surely, 2^{1020504355105} is an apocalyptic number.

It is an amenable number.

1020504355105 is a deficient number, since it is larger than the sum of its proper divisors (209547472559).

1020504355105 is a wasteful number, since it uses less digits than its factorization.

1020504355105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251796.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 1020504355105 in words is "one trillion, twenty billion, five hundred four million, three hundred fifty-five thousand, one hundred five".