221122233221 has 8 divisors (see below), whose sum is σ = 224246905344. Its totient is φ = 217997846640.

The previous prime is 221122233203. The next prime is 221122233239. The reversal of 221122233221 is 122332221122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221122233203) and next prime (221122233239).

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 221122233221 - 2³⁴ = 203942364037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122233251) 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, 1851500 + ... + 1967306.

It is an arithmetic number, because the mean of its divisors is an integer number (28030863168).

Almost surely, 2^221122233221 is an apocalyptic number.

It is an amenable number.

221122233221 is a deficient number, since it is larger than the sum of its proper divisors (3124672123).

221122233221 is a wasteful number, since it uses less digits than its factorization.

221122233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142771.

The product of its digits is 1152, while the sum is 23.

Adding to 221122233221 its reverse (122332221122), we get a palindrome (343454454343).

The spelling of 221122233221 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-three thousand, two hundred twenty-one".