30312221211221 has 8 divisors (see below), whose sum is σ = 30533626300800. Its totient is φ = 30090818266848.

The previous prime is 30312221211199. The next prime is 30312221211277. The reversal of 30312221211221 is 12211212221303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312221211221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312221217221) 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, 37794230 + ... + 38587928.

It is an arithmetic number, because the mean of its divisors is an integer number (3816703287600).

Almost surely, 2^{30312221211221} is an apocalyptic number.

It is an amenable number.

30312221211221 is a deficient number, since it is larger than the sum of its proper divisors (221405089579).

30312221211221 is a wasteful number, since it uses less digits than its factorization.

30312221211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072603.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 30312221211221 its reverse (12211212221303), we get a palindrome (42523433432524).

The spelling of 30312221211221 in words is "thirty trillion, three hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".