30223122221 has 4 divisors (see below), whose sum is σ = 30223860252. Its totient is φ = 30222384192.

The previous prime is 30223122203. The next prime is 30223122247. The reversal of 30223122221 is 12222132203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12222132203 = 61 ⋅200362823.

It can be written as a sum of positive squares in 2 ways, for example, as 8077515625 + 22145606596 = 89875^2 + 148814^2 .

It is a cyclic number.

It is not a de Polignac number, because 30223122221 - 2¹⁸ = 30222860077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30223122193 and 30223122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30223121221) 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, 303740 + ... + 390773.

It is an arithmetic number, because the mean of its divisors is an integer number (7555965063).

Almost surely, 2^30223122221 is an apocalyptic number.

It is an amenable number.

30223122221 is a deficient number, since it is larger than the sum of its proper divisors (738031).

30223122221 is an equidigital number, since it uses as much as digits as its factorization.

30223122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738030.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 30223122221 its reverse (12222132203), we get a palindrome (42445254424).

The spelling of 30223122221 in words is "thirty billion, two hundred twenty-three million, one hundred twenty-two thousand, two hundred twenty-one".