105221131 has 4 divisors (see below), whose sum is σ = 107004600. Its totient is φ = 103437664.

The previous prime is 105221117. The next prime is 105221141. The reversal of 105221131 is 131122501.

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

It is a cyclic number.

It is not a de Polignac number, because 105221131 - 2⁷ = 105221003 is a prime.

It is a super-2 number, since 2×105221131² = 22142972817838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105221101) 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, 891646 + ... + 891763.

It is an arithmetic number, because the mean of its divisors is an integer number (26751150).

Almost surely, 2^105221131 is an apocalyptic number.

105221131 is a deficient number, since it is larger than the sum of its proper divisors (1783469).

105221131 is an equidigital number, since it uses as much as digits as its factorization.

105221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783468.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 105221131 is about 10257.7351788784. The cubic root of 105221131 is about 472.1003494264.

Adding to 105221131 its reverse (131122501), we get a palindrome (236343632).

The spelling of 105221131 in words is "one hundred five million, two hundred twenty-one thousand, one hundred thirty-one".