105221161 has 4 divisors (see below), whose sum is σ = 108615424. Its totient is φ = 101826900.

The previous prime is 105221153. The next prime is 105221167. The reversal of 105221161 is 161122501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161122501 = 71 ⋅2269331.

It is a cyclic number.

It is not a de Polignac number, because 105221161 - 2³ = 105221153 is a prime.

It is a super-2 number, since 2×105221161² = 22142985444375842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105221167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697085 + ... + 1697146.

It is an arithmetic number, because the mean of its divisors is an integer number (27153856).

Almost surely, 2^105221161 is an apocalyptic number.

It is an amenable number.

105221161 is a deficient number, since it is larger than the sum of its proper divisors (3394263).

105221161 is an equidigital number, since it uses as much as digits as its factorization.

105221161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394262.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 105221161 is about 10257.7366411894. The cubic root of 105221161 is about 472.1003942939.

Adding to 105221161 its reverse (161122501), we get a palindrome (266343662).

The spelling of 105221161 in words is "one hundred five million, two hundred twenty-one thousand, one hundred sixty-one".