221041011 has 4 divisors (see below), whose sum is σ = 294721352. Its totient is φ = 147360672.

The previous prime is 221040979. The next prime is 221041019. The reversal of 221041011 is 110140122.

It is a happy number.

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

It is not a de Polignac number, because 221041011 - 2⁵ = 221040979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221041019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36840166 + ... + 36840171.

It is an arithmetic number, because the mean of its divisors is an integer number (73680338).

Almost surely, 2^221041011 is an apocalyptic number.

221041011 is a deficient number, since it is larger than the sum of its proper divisors (73680341).

221041011 is an equidigital number, since it uses as much as digits as its factorization.

221041011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73680340.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221041011 is about 14867.4480325307. The cubic root of 221041011 is about 604.6317555073.

Adding to 221041011 its reverse (110140122), we get a palindrome (331181133).

The spelling of 221041011 in words is "two hundred twenty-one million, forty-one thousand, eleven".