30221343345521 has 4 divisors (see below), whose sum is σ = 30319784203632. Its totient is φ = 30122902487412.

The previous prime is 30221343345461. The next prime is 30221343345527. The reversal of 30221343345521 is 12554334312203.

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 a de Polignac number, because none of the positive numbers 2^k-30221343345521 is a prime.

It is a super-2 number, since 2×30221343345521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30221343345527) 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, 49220428595 + ... + 49220429208.

It is an arithmetic number, because the mean of its divisors is an integer number (7579946050908).

Almost surely, 2^{30221343345521} is an apocalyptic number.

It is an amenable number.

30221343345521 is a deficient number, since it is larger than the sum of its proper divisors (98440858111).

30221343345521 is an equidigital number, since it uses as much as digits as its factorization.

30221343345521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98440858110.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 30221343345521 its reverse (12554334312203), we get a palindrome (42775677657724).

The spelling of 30221343345521 in words is "thirty trillion, two hundred twenty-one billion, three hundred forty-three million, three hundred forty-five thousand, five hundred twenty-one".