30121100213 has 2 divisors, whose sum is σ = 30121100214. Its totient is φ = 30121100212.

The previous prime is 30121100161. The next prime is 30121100227. The reversal of 30121100213 is 31200112103.

It is an a-pointer prime, because the next prime (30121100227) can be obtained adding 30121100213 to its sum of digits (14).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24901471204 + 5219629009 = 157802^2 + 72247^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121100213 - 2²⁶ = 30053991349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121103213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060550106 + 15060550107.

It is an arithmetic number, because the mean of its divisors is an integer number (15060550107).

Almost surely, 2^30121100213 is an apocalyptic number.

It is an amenable number.

30121100213 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121100213 is an equidigital number, since it uses as much as digits as its factorization.

30121100213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30121100213 its reverse (31200112103), we get a palindrome (61321212316).

The spelling of 30121100213 in words is "thirty billion, one hundred twenty-one million, one hundred thousand, two hundred thirteen".