105422243021 has 4 divisors (see below), whose sum is σ = 111623551452. Its totient is φ = 99220934592.

The previous prime is 105422242997. The next prime is 105422243041. The reversal of 105422243021 is 120342224501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120342224501 = 15259 ⋅7886639.

It can be written as a sum of positive squares in 2 ways, for example, as 77721633796 + 27700609225 = 278786^2 + 166435^2 .

It is a cyclic number.

It is not a de Polignac number, because 105422243021 - 2²² = 105418048717 is a prime.

It is a super-2 number, since 2×105422243021² (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 (105422243041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3100654190 + ... + 3100654223.

It is an arithmetic number, because the mean of its divisors is an integer number (27905887863).

Almost surely, 2^105422243021 is an apocalyptic number.

It is an amenable number.

105422243021 is a deficient number, since it is larger than the sum of its proper divisors (6201308431).

105422243021 is an equidigital number, since it uses as much as digits as its factorization.

105422243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201308430.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 105422243021 its reverse (120342224501), we get a palindrome (225764467522).

The spelling of 105422243021 in words is "one hundred five billion, four hundred twenty-two million, two hundred forty-three thousand, twenty-one".