30221102221 has 4 divisors (see below), whose sum is σ = 30225737500. Its totient is φ = 30216466944.

The previous prime is 30221102179. The next prime is 30221102231. The reversal of 30221102221 is 12220112203.

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: 12220112203 = 13 ⋅940008631.

It can be written as a sum of positive squares in 2 ways, for example, as 4424245225 + 25796856996 = 66515^2 + 160614^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221102221 - 2¹⁷ = 30220971149 is a prime.

It is a super-2 number, since 2×30221102221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30221102195 and 30221102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221102231) 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, 2307846 + ... + 2320903.

It is an arithmetic number, because the mean of its divisors is an integer number (7556434375).

Almost surely, 2^30221102221 is an apocalyptic number.

It is an amenable number.

30221102221 is a deficient number, since it is larger than the sum of its proper divisors (4635279).

30221102221 is an equidigital number, since it uses as much as digits as its factorization.

30221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635278.

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

Adding to 30221102221 its reverse (12220112203), we get a palindrome (42441214424).

The spelling of 30221102221 in words is "thirty billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".