105323021 has 2 divisors, whose sum is σ = 105323022. Its totient is φ = 105323020.

The previous prime is 105323017. The next prime is 105323069. The reversal of 105323021 is 120323501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97732996 + 7590025 = 9886^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 105323021 - 2² = 105323017 is a prime.

It is a super-2 number, since 2×105323021² = 22185877505132882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105323011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52661510 + 52661511.

It is an arithmetic number, because the mean of its divisors is an integer number (52661511).

Almost surely, 2^105323021 is an apocalyptic number.

It is an amenable number.

105323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

105323021 is an equidigital number, since it uses as much as digits as its factorization.

105323021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 105323021 is about 10262.7004730724. The cubic root of 105323021 is about 472.2526850711.

Adding to 105323021 its reverse (120323501), we get a palindrome (225646522).

The spelling of 105323021 in words is "one hundred five million, three hundred twenty-three thousand, twenty-one".