2011223221 has 8 divisors (see below), whose sum is σ = 2299699904. Its totient is φ = 1723036320.

The previous prime is 2011223213. The next prime is 2011223237. The reversal of 2011223221 is 1223221102.

It is a happy number.

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 2011223221 - 2³ = 2011223213 is a prime.

It is a super-2 number, since 2×2011223221² = 8090037689379229682, which contains 22 as substring.

It is a Duffinian number.

2011223221 is a modest number, since divided by 223221 gives 2011 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2011223195 and 2011223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011223261) 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, 57360 + ... + 85513.

It is an arithmetic number, because the mean of its divisors is an integer number (287462488).

Almost surely, 2^2011223221 is an apocalyptic number.

It is an amenable number.

2011223221 is a deficient number, since it is larger than the sum of its proper divisors (288476683).

2011223221 is a wasteful number, since it uses less digits than its factorization.

2011223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144891.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2011223221 is about 44846.6634321886. The cubic root of 2011223221 is about 1262.2733839700.

Adding to 2011223221 its reverse (1223221102), we get a palindrome (3234444323).

The spelling of 2011223221 in words is "two billion, eleven million, two hundred twenty-three thousand, two hundred twenty-one".