30212021209 has 2 divisors, whose sum is σ = 30212021210. Its totient is φ = 30212021208.

The previous prime is 30212021179. The next prime is 30212021249. The reversal of 30212021209 is 90212021203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15119161600 + 15092859609 = 122960^2 + 122853^2 .

It is an emirp because it is prime and its reverse (90212021203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30212021209 - 2²⁵ = 30178466777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30212021209.

It is not a weakly prime, because it can be changed into another prime (30212021249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106010604 + 15106010605.

It is an arithmetic number, because the mean of its divisors is an integer number (15106010605).

Almost surely, 2^30212021209 is an apocalyptic number.

It is an amenable number.

30212021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212021209 is an equidigital number, since it uses as much as digits as its factorization.

30212021209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 30212021209 in words is "thirty billion, two hundred twelve million, twenty-one thousand, two hundred nine".