30231223231221 has 6 divisors (see below), whose sum is σ = 43667322445110. Its totient is φ = 20154148820808.

The previous prime is 30231223231213. The next prime is 30231223231241. The reversal of 30231223231221 is 12213232213203.

30231223231221 is a `hidden beast` number, since 3 + 0 + 2 + 312 + 2 + 32 + 312 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29908746894321 + 322476336900 = 5468889^2 + 567870^2 .

It is not a de Polignac number, because 30231223231221 - 2³ = 30231223231213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30231223231201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1679512401726 + ... + 1679512401743.

It is an arithmetic number, because the mean of its divisors is an integer number (7277887074185).

Almost surely, 2^{30231223231221} is an apocalyptic number.

It is an amenable number.

30231223231221 is a deficient number, since it is larger than the sum of its proper divisors (13436099213889).

30231223231221 is a wasteful number, since it uses less digits than its factorization.

30231223231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359024803475 (or 3359024803472 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 30231223231221 its reverse (12213232213203), we get a palindrome (42444455444424).

The spelling of 30231223231221 in words is "thirty trillion, two hundred thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty-one".