30121051 has 2 divisors, whose sum is σ = 30121052. Its totient is φ = 30121050.

The previous prime is 30121043. The next prime is 30121073. The reversal of 30121051 is 15012103.

It is a weak prime.

It is an emirp because it is prime and its reverse (15012103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30121051 - 2³ = 30121043 is a prime.

It is not a weakly prime, because it can be changed into another prime (30121001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060525 + 15060526.

It is an arithmetic number, because the mean of its divisors is an integer number (15060526).

Almost surely, 2^30121051 is an apocalyptic number.

30121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121051 is an equidigital number, since it uses as much as digits as its factorization.

30121051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 30121051 is about 5488.2648441926. The cubic root of 30121051 is about 311.1406159612.

Adding to 30121051 its reverse (15012103), we get a palindrome (45133154).

The spelling of 30121051 in words is "thirty million, one hundred twenty-one thousand, fifty-one".