221223011 has 4 divisors (see below), whose sum is σ = 221331000. Its totient is φ = 221115024.

The previous prime is 221223001. The next prime is 221223029. The reversal of 221223011 is 110322122.

It is a happy number.

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 221223011 - 2¹⁴ = 221206627 is a prime.

It is a super-2 number, since 2×221223011² = 97879241191812242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223001) 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, 50861 + ... + 55038.

It is an arithmetic number, because the mean of its divisors is an integer number (55332750).

Almost surely, 2^221223011 is an apocalyptic number.

221223011 is a deficient number, since it is larger than the sum of its proper divisors (107989).

221223011 is a wasteful number, since it uses less digits than its factorization.

221223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107988.

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

The square root of 221223011 is about 14873.5675276646. The cubic root of 221223011 is about 604.7976565325.

Adding to 221223011 its reverse (110322122), we get a palindrome (331545133).

The spelling of 221223011 in words is "two hundred twenty-one million, two hundred twenty-three thousand, eleven".