1020234345205 has 4 divisors (see below), whose sum is σ = 1224281214252. Its totient is φ = 816187476160.

The previous prime is 1020234345173. The next prime is 1020234345269. The reversal of 1020234345205 is 5025434320201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142756264561 + 877478080644 = 377831^2 + 936738^2 .

It is not a de Polignac number, because 1020234345205 - 2⁵ = 1020234345173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102023434516 + ... + 102023434525.

It is an arithmetic number, because the mean of its divisors is an integer number (306070303563).

Almost surely, 2^{1020234345205} is an apocalyptic number.

It is an amenable number.

1020234345205 is a deficient number, since it is larger than the sum of its proper divisors (204046869047).

1020234345205 is an equidigital number, since it uses as much as digits as its factorization.

1020234345205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204046869046.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 1020234345205 its reverse (5025434320201), we get a palindrome (6045668665406).

The spelling of 1020234345205 in words is "one trillion, twenty billion, two hundred thirty-four million, three hundred forty-five thousand, two hundred five".