30230021221 has 2 divisors, whose sum is σ = 30230021222. Its totient is φ = 30230021220.

The previous prime is 30230021203. The next prime is 30230021243. The reversal of 30230021221 is 12212003203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29424256225 + 805764996 = 171535^2 + 28386^2 .

It is a cyclic number.

It is not a de Polignac number, because 30230021221 - 2⁵ = 30230021189 is a prime.

It is a super-2 number, since 2×30230021221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30230021195 and 30230021204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30230021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115010610 + 15115010611.

It is an arithmetic number, because the mean of its divisors is an integer number (15115010611).

Almost surely, 2^30230021221 is an apocalyptic number.

It is an amenable number.

30230021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30230021221 is an equidigital number, since it uses as much as digits as its factorization.

30230021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30230021221 its reverse (12212003203), we get a palindrome (42442024424).

The spelling of 30230021221 in words is "thirty billion, two hundred thirty million, twenty-one thousand, two hundred twenty-one".