30321221509 has 2 divisors, whose sum is σ = 30321221510. Its totient is φ = 30321221508.

The previous prime is 30321221461. The next prime is 30321221591. The reversal of 30321221509 is 90512212303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21948422500 + 8372799009 = 148150^2 + 91503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30321221509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30321221209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160610754 + 15160610755.

It is an arithmetic number, because the mean of its divisors is an integer number (15160610755).

Almost surely, 2^30321221509 is an apocalyptic number.

It is an amenable number.

30321221509 is a deficient number, since it is larger than the sum of its proper divisors (1).

30321221509 is an equidigital number, since it uses as much as digits as its factorization.

30321221509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 30321221509 in words is "thirty billion, three hundred twenty-one million, two hundred twenty-one thousand, five hundred nine".