30321220022021 has 4 divisors (see below), whose sum is σ = 30321348981132. Its totient is φ = 30321091062912.

The previous prime is 30321220021951. The next prime is 30321220022153. The reversal of 30321220022021 is 12022002212303.

It is a happy number.

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 21171133464100 + 9150086557921 = 4601210^2 + 3024911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30321220022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30321220021984 and 30321220022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321220022321) 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, 64126226 + ... + 64597331.

It is an arithmetic number, because the mean of its divisors is an integer number (7580337245283).

Almost surely, 2^{30321220022021} is an apocalyptic number.

It is an amenable number.

30321220022021 is a deficient number, since it is larger than the sum of its proper divisors (128959111).

30321220022021 is a wasteful number, since it uses less digits than its factorization.

30321220022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128959110.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 30321220022021 its reverse (12022002212303), we get a palindrome (42343222234324).

The spelling of 30321220022021 in words is "thirty trillion, three hundred twenty-one billion, two hundred twenty million, twenty-two thousand, twenty-one".