105105440105 has 4 divisors (see below), whose sum is σ = 126126528132. Its totient is φ = 84084352080.

The previous prime is 105105440057. The next prime is 105105440107. The reversal of 105105440105 is 501044501501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501044501501 = 1303 ⋅384531467.

It can be written as a sum of positive squares in 2 ways, for example, as 60748446784 + 44356993321 = 246472^2 + 210611^2 .

It is not a de Polignac number, because 105105440105 - 2⁸ = 105105439849 is a prime.

It is a super-2 number, since 2×105105440105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105105440107) 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, 10510544006 + ... + 10510544015.

It is an arithmetic number, because the mean of its divisors is an integer number (31531632033).

Almost surely, 2^105105440105 is an apocalyptic number.

It is an amenable number.

105105440105 is a deficient number, since it is larger than the sum of its proper divisors (21021088027).

105105440105 is an equidigital number, since it uses as much as digits as its factorization.

105105440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021088026.

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

Adding to 105105440105 its reverse (501044501501), we get a palindrome (606149941606).

The spelling of 105105440105 in words is "one hundred five billion, one hundred five million, four hundred forty thousand, one hundred five".