30420224021221 has 4 divisors (see below), whose sum is σ = 30420309834700. Its totient is φ = 30420138207744.

The previous prime is 30420224021183. The next prime is 30420224021269. The reversal of 30420224021221 is 12212042202403.

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 14797485562500 + 15622738458721 = 3846750^2 + 3952561^2 .

It is a cyclic number.

It is not a de Polignac number, because 30420224021221 - 2¹⁹ = 30420223496933 is a prime.

It is a super-2 number, since 2×30420224021221² (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 (30420224021521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42372786 + ... + 43084723.

It is an arithmetic number, because the mean of its divisors is an integer number (7605077458675).

Almost surely, 2^{30420224021221} is an apocalyptic number.

It is an amenable number.

30420224021221 is a deficient number, since it is larger than the sum of its proper divisors (85813479).

30420224021221 is an equidigital number, since it uses as much as digits as its factorization.

30420224021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85813478.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 30420224021221 its reverse (12212042202403), we get a palindrome (42632266223624).

The spelling of 30420224021221 in words is "thirty trillion, four hundred twenty billion, two hundred twenty-four million, twenty-one thousand, two hundred twenty-one".