30012121020209 has 2 divisors, whose sum is σ = 30012121020210. Its totient is φ = 30012121020208.

The previous prime is 30012121020181. The next prime is 30012121020223. The reversal of 30012121020209 is 90202012121003.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24652247800609 + 5359873219600 = 4965103^2 + 2315140^2 .

It is an emirp because it is prime and its reverse (90202012121003) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30012121020209 is a prime.

It is not a weakly prime, because it can be changed into another prime (30012121020229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15006060510104 + 15006060510105.

It is an arithmetic number, because the mean of its divisors is an integer number (15006060510105).

Almost surely, 2^{30012121020209} is an apocalyptic number.

It is an amenable number.

30012121020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

30012121020209 is an equidigital number, since it uses as much as digits as its factorization.

30012121020209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 30012121020209 in words is "thirty trillion, twelve billion, one hundred twenty-one million, twenty thousand, two hundred nine".