30231012320221 has 4 divisors (see below), whose sum is σ = 31048066707292. Its totient is φ = 29413957933152.

The previous prime is 30231012320129. The next prime is 30231012320251. The reversal of 30231012320221 is 12202321013203.

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 13583094525625 + 16647917794596 = 3685525^2 + 4080186^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231012320221 - 2⁹ = 30231012319709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30231012320192 and 30231012320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30231012320251) 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, 408527193480 + ... + 408527193553.

It is an arithmetic number, because the mean of its divisors is an integer number (7762016676823).

Almost surely, 2^{30231012320221} is an apocalyptic number.

It is an amenable number.

30231012320221 is a deficient number, since it is larger than the sum of its proper divisors (817054387071).

30231012320221 is an equidigital number, since it uses as much as digits as its factorization.

30231012320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817054387070.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 30231012320221 its reverse (12202321013203), we get a palindrome (42433333333424).

The spelling of 30231012320221 in words is "thirty trillion, two hundred thirty-one billion, twelve million, three hundred twenty thousand, two hundred twenty-one".