221105011 has 4 divisors (see below), whose sum is σ = 226247032. Its totient is φ = 215962992.

The previous prime is 221104997. The next prime is 221105039. The reversal of 221105011 is 110501122.

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 221105011 - 2⁵ = 221104979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221104982 and 221105000.

It is not an unprimeable number, because it can be changed into a prime (221105041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2570946 + ... + 2571031.

It is an arithmetic number, because the mean of its divisors is an integer number (56561758).

Almost surely, 2^221105011 is an apocalyptic number.

221105011 is a deficient number, since it is larger than the sum of its proper divisors (5142021).

221105011 is an equidigital number, since it uses as much as digits as its factorization.

221105011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142020.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 221105011 is about 14869.6002299995. The cubic root of 221105011 is about 604.6901047069.

Adding to 221105011 its reverse (110501122), we get a palindrome (331606133).

The spelling of 221105011 in words is "two hundred twenty-one million, one hundred five thousand, eleven".