30616121 has 2 divisors, whose sum is σ = 30616122. Its totient is φ = 30616120.

The previous prime is 30616111. The next prime is 30616147. The reversal of 30616121 is 12161603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 14100025 = 4064^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 30616121 - 2¹⁸ = 30353977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30616093 and 30616102.

It is not a weakly prime, because it can be changed into another prime (30616111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15308060 + 15308061.

It is an arithmetic number, because the mean of its divisors is an integer number (15308061).

Almost surely, 2^30616121 is an apocalyptic number.

It is an amenable number.

30616121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30616121 is an equidigital number, since it uses as much as digits as its factorization.

30616121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30616121 is about 5533.1836224727. The cubic root of 30616121 is about 312.8359982870.

Adding to 30616121 its reverse (12161603), we get a palindrome (42777724).

It can be divided in two parts, 3061 and 6121, that multiplied together give a triangular number (18736381 = T₆₁₂₁).

The spelling of 30616121 in words is "thirty million, six hundred sixteen thousand, one hundred twenty-one".