10521761105 has 4 divisors (see below), whose sum is σ = 12626113332. Its totient is φ = 8417408880.

The previous prime is 10521761101. The next prime is 10521761113. The reversal of 10521761105 is 50116712501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50116712501 = 66571 ⋅752831.

It can be written as a sum of positive squares in 2 ways, for example, as 4010562241 + 6511198864 = 63329^2 + 80692^2 .

It is not a de Polignac number, because 10521761105 - 2² = 10521761101 is a prime.

It is a super-2 number, since 2×10521761105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10521761101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052176106 + ... + 1052176115.

It is an arithmetic number, because the mean of its divisors is an integer number (3156528333).

Almost surely, 2^10521761105 is an apocalyptic number.

It is an amenable number.

10521761105 is a deficient number, since it is larger than the sum of its proper divisors (2104352227).

10521761105 is an equidigital number, since it uses as much as digits as its factorization.

10521761105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104352226.

The product of its (nonzero) digits is 2100, while the sum is 29.

The spelling of 10521761105 in words is "ten billion, five hundred twenty-one million, seven hundred sixty-one thousand, one hundred five".