221043011 has 8 divisors (see below), whose sum is σ = 254294784. Its totient is φ = 188209800.

The previous prime is 221043007. The next prime is 221043023. The reversal of 221043011 is 110340122.

221043011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221043011 - 2² = 221043007 is a prime.

It is a super-2 number, since 2×221043011² = 97720025423892242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221043001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103505 + ... + 105618.

It is an arithmetic number, because the mean of its divisors is an integer number (31786848).

Almost surely, 2^221043011 is an apocalyptic number.

221043011 is a deficient number, since it is larger than the sum of its proper divisors (33251773).

221043011 is a wasteful number, since it uses less digits than its factorization.

221043011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209281.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221043011 is about 14867.5152934174. The cubic root of 221043011 is about 604.6335790902.

Adding to 221043011 its reverse (110340122), we get a palindrome (331383133).

The spelling of 221043011 in words is "two hundred twenty-one million, forty-three thousand, eleven".