30633240221 has 2 divisors, whose sum is σ = 30633240222. Its totient is φ = 30633240220.

The previous prime is 30633240217. The next prime is 30633240223. The reversal of 30633240221 is 12204233603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29065476196 + 1567764025 = 170486^2 + 39595^2 .

It is a cyclic number.

It is not a de Polignac number, because 30633240221 - 2² = 30633240217 is a prime.

Together with 30633240223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30633240223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15316620110 + 15316620111.

It is an arithmetic number, because the mean of its divisors is an integer number (15316620111).

Almost surely, 2^30633240221 is an apocalyptic number.

It is an amenable number.

30633240221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30633240221 is an equidigital number, since it uses as much as digits as its factorization.

30633240221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 30633240221 its reverse (12204233603), we get a palindrome (42837473824).

The spelling of 30633240221 in words is "thirty billion, six hundred thirty-three million, two hundred forty thousand, two hundred twenty-one".