105221805173 has 2 divisors, whose sum is σ = 105221805174. Its totient is φ = 105221805172.

The previous prime is 105221805137. The next prime is 105221805179. The reversal of 105221805173 is 371508122501.

Together with previous prime (105221805137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87250525924 + 17971279249 = 295382^2 + 134057^2 .

It is a cyclic number.

It is not a de Polignac number, because 105221805173 - 2²⁴ = 105205027957 is a prime.

It is a super-2 number, since 2×105221805173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105221805179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52610902586 + 52610902587.

It is an arithmetic number, because the mean of its divisors is an integer number (52610902587).

Almost surely, 2^105221805173 is an apocalyptic number.

It is an amenable number.

105221805173 is a deficient number, since it is larger than the sum of its proper divisors (1).

105221805173 is an equidigital number, since it uses as much as digits as its factorization.

105221805173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 105221805173 its reverse (371508122501), we get a palindrome (476729927674).

The spelling of 105221805173 in words is "one hundred five billion, two hundred twenty-one million, eight hundred five thousand, one hundred seventy-three".