30203321220221 has 4 divisors (see below), whose sum is σ = 30211160134332. Its totient is φ = 30195482306112.

The previous prime is 30203321220217. The next prime is 30203321220239. The reversal of 30203321220221 is 12202212330203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29173879651225 + 1029441568996 = 5401285^2 + 1014614^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203321220221 - 2² = 30203321220217 is a prime.

It is a super-2 number, since 2×30203321220221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203321220251) 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, 3919451276 + ... + 3919458981.

It is an arithmetic number, because the mean of its divisors is an integer number (7552790033583).

Almost surely, 2^{30203321220221} is an apocalyptic number.

It is an amenable number.

30203321220221 is a deficient number, since it is larger than the sum of its proper divisors (7838914111).

30203321220221 is an equidigital number, since it uses as much as digits as its factorization.

30203321220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838914110.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 30203321220221 its reverse (12202212330203), we get a palindrome (42405533550424).

The spelling of 30203321220221 in words is "thirty trillion, two hundred three billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".