221030011 has 4 divisors (see below), whose sum is σ = 222353712. Its totient is φ = 219706312.

The previous prime is 221030009. The next prime is 221030053. The reversal of 221030011 is 110030122.

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 221030011 - 2¹ = 221030009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221030011.

It is not an unprimeable number, because it can be changed into a prime (221010011) 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, 661600 + ... + 661933.

It is an arithmetic number, because the mean of its divisors is an integer number (55588428).

Almost surely, 2^221030011 is an apocalyptic number.

221030011 is a deficient number, since it is larger than the sum of its proper divisors (1323701).

221030011 is a wasteful number, since it uses less digits than its factorization.

221030011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323700.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 221030011 is about 14867.0780922144. The cubic root of 221030011 is about 604.6217256044.

Adding to 221030011 its reverse (110030122), we get a palindrome (331060133).

The spelling of 221030011 in words is "two hundred twenty-one million, thirty thousand, eleven".