105255443021 has 16 divisors (see below), whose sum is σ = 111349373760. Its totient is φ = 99217797120.

The previous prime is 105255442993. The next prime is 105255443039. The reversal of 105255443021 is 120344552501.

It is a cyclic number.

It is not a de Polignac number, because 105255443021 - 2²⁶ = 105188334157 is a prime.

It is a super-2 number, since 2×105255443021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105255449021) 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 15 ways as a sum of consecutive naturals, for example, 4583450 + ... + 4606356.

It is an arithmetic number, because the mean of its divisors is an integer number (6959335860).

Almost surely, 2^105255443021 is an apocalyptic number.

It is an amenable number.

105255443021 is a deficient number, since it is larger than the sum of its proper divisors (6093930739).

105255443021 is a wasteful number, since it uses less digits than its factorization.

105255443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24124.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 105255443021 its reverse (120344552501), we get a palindrome (225599995522).

The spelling of 105255443021 in words is "one hundred five billion, two hundred fifty-five million, four hundred forty-three thousand, twenty-one".