30223300021 has 2 divisors, whose sum is σ = 30223300022. Its totient is φ = 30223300020.

The previous prime is 30223299959. The next prime is 30223300031. The reversal of 30223300021 is 12000332203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18703571121 + 11519728900 = 136761^2 + 107330^2 .

It is an emirp because it is prime and its reverse (12000332203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30223300021 - 2²⁷ = 30089082293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30223299968 and 30223300004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30223300031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15111650010 + 15111650011.

It is an arithmetic number, because the mean of its divisors is an integer number (15111650011).

Almost surely, 2^30223300021 is an apocalyptic number.

It is an amenable number.

30223300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30223300021 is an equidigital number, since it uses as much as digits as its factorization.

30223300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 30223300021 its reverse (12000332203), we get a palindrome (42223632224).

The spelling of 30223300021 in words is "thirty billion, two hundred twenty-three million, three hundred thousand, twenty-one".