30221220111221 has 4 divisors (see below), whose sum is σ = 30305401783200. Its totient is φ = 30137038439244.

The previous prime is 30221220111217. The next prime is 30221220111233. The reversal of 30221220111221 is 12211102212203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30221220111221 - 2² = 30221220111217 is a prime.

It is a super-2 number, since 2×30221220111221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30221220111193 and 30221220111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221220101221) 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, 42090835451 + ... + 42090836168.

It is an arithmetic number, because the mean of its divisors is an integer number (7576350445800).

Almost surely, 2^{30221220111221} is an apocalyptic number.

It is an amenable number.

30221220111221 is a deficient number, since it is larger than the sum of its proper divisors (84181671979).

30221220111221 is an equidigital number, since it uses as much as digits as its factorization.

30221220111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84181671978.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 30221220111221 its reverse (12211102212203), we get a palindrome (42432322323424).

The spelling of 30221220111221 in words is "thirty trillion, two hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred twenty-one".