30121130261 has 2 divisors, whose sum is σ = 30121130262. Its totient is φ = 30121130260.

The previous prime is 30121130197. The next prime is 30121130269. The reversal of 30121130261 is 16203112103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24182116036 + 5939014225 = 155506^2 + 77065^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121130261 - 2⁶ = 30121130197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121130269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060565130 + 15060565131.

It is an arithmetic number, because the mean of its divisors is an integer number (15060565131).

Almost surely, 2^30121130261 is an apocalyptic number.

It is an amenable number.

30121130261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121130261 is an equidigital number, since it uses as much as digits as its factorization.

30121130261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 30121130261 its reverse (16203112103), we get a palindrome (46324242364).

The spelling of 30121130261 in words is "thirty billion, one hundred twenty-one million, one hundred thirty thousand, two hundred sixty-one".