10305220120505 has 4 divisors (see below), whose sum is σ = 12366264144612. Its totient is φ = 8244176096400.

The previous prime is 10305220120483. The next prime is 10305220120511. The reversal of 10305220120505 is 50502102250301.

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 4686324403264 + 5618895717241 = 2164792^2 + 2370421^2 .

It is not a de Polignac number, because 10305220120505 - 2⁸ = 10305220120249 is a prime.

It is a super-2 number, since 2×10305220120505² (a number of 27 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 3 ways as a sum of consecutive naturals, for example, 1030522012046 + ... + 1030522012055.

It is an arithmetic number, because the mean of its divisors is an integer number (3091566036153).

Almost surely, 2^{10305220120505} is an apocalyptic number.

It is an amenable number.

10305220120505 is a deficient number, since it is larger than the sum of its proper divisors (2061044024107).

10305220120505 is an equidigital number, since it uses as much as digits as its factorization.

10305220120505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061044024106.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 10305220120505 its reverse (50502102250301), we get a palindrome (60807322370806).

The spelling of 10305220120505 in words is "ten trillion, three hundred five billion, two hundred twenty million, one hundred twenty thousand, five hundred five".