30666121 has 4 divisors (see below), whose sum is σ = 30677200. Its totient is φ = 30655044.

The previous prime is 30666109. The next prime is 30666127. The reversal of 30666121 is 12166603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12166603 = 2153 ⋅5651.

It is a cyclic number.

It is not a de Polignac number, because 30666121 - 2⁷ = 30665993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30666127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590 + ... + 8248.

It is an arithmetic number, because the mean of its divisors is an integer number (7669300).

Almost surely, 2^30666121 is an apocalyptic number.

It is an amenable number.

30666121 is a deficient number, since it is larger than the sum of its proper divisors (11079).

30666121 is an equidigital number, since it uses as much as digits as its factorization.

30666121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30666121 is about 5537.6999738158. The cubic root of 30666121 is about 313.0062059217.

The spelling of 30666121 in words is "thirty million, six hundred sixty-six thousand, one hundred twenty-one".