30121229993 has 2 divisors, whose sum is σ = 30121229994. Its totient is φ = 30121229992.

The previous prime is 30121229959. The next prime is 30121230053. The reversal of 30121229993 is 39992212103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23283097744 + 6838132249 = 152588^2 + 82693^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121229993 - 2⁸ = 30121229737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30121229993.

It is not a weakly prime, because it can be changed into another prime (30121229903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060614996 + 15060614997.

It is an arithmetic number, because the mean of its divisors is an integer number (15060614997).

Almost surely, 2^30121229993 is an apocalyptic number.

It is an amenable number.

30121229993 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121229993 is an equidigital number, since it uses as much as digits as its factorization.

30121229993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 30121229993 in words is "thirty billion, one hundred twenty-one million, two hundred twenty-nine thousand, nine hundred ninety-three".