30121001 has 2 divisors, whose sum is σ = 30121002. Its totient is φ = 30121000.

The previous prime is 30120973. The next prime is 30121043. The reversal of 30121001 is 10012103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 90601 = 5480^2 + 301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121001 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30121001.

It is not a weakly prime, because it can be changed into another prime (30121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060500 + 15060501.

It is an arithmetic number, because the mean of its divisors is an integer number (15060501).

Almost surely, 2^30121001 is an apocalyptic number.

It is an amenable number.

30121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121001 is an equidigital number, since it uses as much as digits as its factorization.

30121001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 30121001 is about 5488.2602890169. The cubic root of 30121001 is about 311.1404437999.

Adding to 30121001 its reverse (10012103), we get a palindrome (40133104).

The spelling of 30121001 in words is "thirty million, one hundred twenty-one thousand, one".