30031301021 has 2 divisors, whose sum is σ = 30031301022. Its totient is φ = 30031301020.

The previous prime is 30031301017. The next prime is 30031301033. The reversal of 30031301021 is 12010313003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26240436121 + 3790864900 = 161989^2 + 61570^2 .

It is a cyclic number.

It is not a de Polignac number, because 30031301021 - 2² = 30031301017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30031300987 and 30031301005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30031301011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015650510 + 15015650511.

It is an arithmetic number, because the mean of its divisors is an integer number (15015650511).

Almost surely, 2^30031301021 is an apocalyptic number.

It is an amenable number.

30031301021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30031301021 is an equidigital number, since it uses as much as digits as its factorization.

30031301021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 30031301021 its reverse (12010313003), we get a palindrome (42041614024).

The spelling of 30031301021 in words is "thirty billion, thirty-one million, three hundred one thousand, twenty-one".