30220121221 has 8 divisors (see below), whose sum is σ = 31344180984. Its totient is φ = 29112235200.

The previous prime is 30220121171. The next prime is 30220121233. The reversal of 30220121221 is 12212102203.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12627016900 + 17593104321 = 112370^2 + 132639^2 .

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 30220121221 - 2¹⁷ = 30219990149 is a prime.

It is a super-2 number, since 2×30220121221² (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 = 30220121195 and 30220121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30220121021) 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, 4039630 + ... + 4047103.

It is an arithmetic number, because the mean of its divisors is an integer number (3918022623).

Almost surely, 2^30220121221 is an apocalyptic number.

It is an amenable number.

30220121221 is a deficient number, since it is larger than the sum of its proper divisors (1124059763).

30220121221 is a wasteful number, since it uses less digits than its factorization.

30220121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086871.

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

Adding to 30220121221 its reverse (12212102203), we get a palindrome (42432223424).

The spelling of 30220121221 in words is "thirty billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".