105520221 has 12 divisors (see below), whose sum is σ = 154348480. Its totient is φ = 69455880.

The previous prime is 105520201. The next prime is 105520231. The reversal of 105520221 is 122025501.

It is not a de Polignac number, because 105520221 - 2⁶ = 105520157 is a prime.

It is a super-2 number, since 2×105520221² = 22269034079777682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105520194 and 105520203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105520201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73495 + ... + 74916.

Almost surely, 2^105520221 is an apocalyptic number.

It is an amenable number.

105520221 is a deficient number, since it is larger than the sum of its proper divisors (48828259).

105520221 is a wasteful number, since it uses less digits than its factorization.

105520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148496 (or 148493 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 105520221 is about 10272.3035878035. The cubic root of 105520221 is about 472.5472397549.

Adding to 105520221 its reverse (122025501), we get a palindrome (227545722).

The spelling of 105520221 in words is "one hundred five million, five hundred twenty thousand, two hundred twenty-one".