30121207 has 2 divisors, whose sum is σ = 30121208. Its totient is φ = 30121206.

The previous prime is 30121163. The next prime is 30121241. The reversal of 30121207 is 70212103.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30121207 - 2⁷ = 30121079 is a prime.

It is a super-2 number, since 2×30121207² = 1814574222273698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060603 + 15060604.

It is an arithmetic number, because the mean of its divisors is an integer number (15060604).

Almost surely, 2^30121207 is an apocalyptic number.

30121207 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121207 is an equidigital number, since it uses as much as digits as its factorization.

30121207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 30121207 is about 5488.2790563163. The cubic root of 30121207 is about 311.1411531033.

The spelling of 30121207 in words is "thirty million, one hundred twenty-one thousand, two hundred seven".