30121330181 has 2 divisors, whose sum is σ = 30121330182. Its totient is φ = 30121330180.

The previous prime is 30121330103. The next prime is 30121330207. The reversal of 30121330181 is 18103312103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27752561281 + 2368768900 = 166591^2 + 48670^2 .

It is an emirp because it is prime and its reverse (18103312103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30121330181 - 2¹⁰ = 30121329157 is a prime.

It is a super-2 number, since 2×30121330181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121332181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060665090 + 15060665091.

It is an arithmetic number, because the mean of its divisors is an integer number (15060665091).

Almost surely, 2^30121330181 is an apocalyptic number.

It is an amenable number.

30121330181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121330181 is an equidigital number, since it uses as much as digits as its factorization.

30121330181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 30121330181 its reverse (18103312103), we get a palindrome (48224642284).

The spelling of 30121330181 in words is "thirty billion, one hundred twenty-one million, three hundred thirty thousand, one hundred eighty-one".