105210235321 has 4 divisors (see below), whose sum is σ = 108838174500. Its totient is φ = 101582296144.

The previous prime is 105210235279. The next prime is 105210235343. The reversal of 105210235321 is 123532012501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64823706025 + 40386529296 = 254605^2 + 200964^2 .

It is a cyclic number.

It is not a de Polignac number, because 105210235321 - 2⁹ = 105210234809 is a prime.

It is a super-2 number, since 2×105210235321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105210235021) 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, 1813969546 + ... + 1813969603.

It is an arithmetic number, because the mean of its divisors is an integer number (27209543625).

Almost surely, 2^105210235321 is an apocalyptic number.

It is an amenable number.

105210235321 is a deficient number, since it is larger than the sum of its proper divisors (3627939179).

105210235321 is an equidigital number, since it uses as much as digits as its factorization.

105210235321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627939178.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 105210235321 its reverse (123532012501), we get a palindrome (228742247822).

The spelling of 105210235321 in words is "one hundred five billion, two hundred ten million, two hundred thirty-five thousand, three hundred twenty-one".