30122021309 has 2 divisors, whose sum is σ = 30122021310. Its totient is φ = 30122021308.

The previous prime is 30122021287. The next prime is 30122021341. The reversal of 30122021309 is 90312022103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23080294084 + 7041727225 = 151922^2 + 83915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30122021309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30122021389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061010654 + 15061010655.

It is an arithmetic number, because the mean of its divisors is an integer number (15061010655).

Almost surely, 2^30122021309 is an apocalyptic number.

It is an amenable number.

30122021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

30122021309 is an equidigital number, since it uses as much as digits as its factorization.

30122021309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 30122021309 in words is "thirty billion, one hundred twenty-two million, twenty-one thousand, three hundred nine".