10105245521 has 4 divisors (see below), whose sum is σ = 11548852032. Its totient is φ = 8661639012.

The previous prime is 10105245517. The next prime is 10105245571. The reversal of 10105245521 is 12554250101.

10105245521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10105245521 - 2² = 10105245517 is a prime.

It is a super-2 number, since 2×10105245521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10105245571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721803245 + ... + 721803258.

It is an arithmetic number, because the mean of its divisors is an integer number (2887213008).

Almost surely, 2^10105245521 is an apocalyptic number.

It is an amenable number.

10105245521 is a deficient number, since it is larger than the sum of its proper divisors (1443606511).

10105245521 is an equidigital number, since it uses as much as digits as its factorization.

10105245521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443606510.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 10105245521 its reverse (12554250101), we get a palindrome (22659495622).

The spelling of 10105245521 in words is "ten billion, one hundred five million, two hundred forty-five thousand, five hundred twenty-one".