30121 has 8 divisors (see below), whose sum is σ = 37184. Its totient is φ = 23760.

The previous prime is 30119. The next prime is 30133. The reversal of 30121 is 12103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30121 - 2¹ = 30119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is an alternating number because its digits alternate between odd and even.

30121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (30161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75 + ... + 256.

It is an arithmetic number, because the mean of its divisors is an integer number (4648).

It is a Poulet number, since it divides 2³⁰¹²⁰-1.

2³⁰¹²¹ is an apocalyptic number.

It is an amenable number.

30121 is a deficient number, since it is larger than the sum of its proper divisors (7063).

30121 is a wasteful number, since it uses less digits than its factorization.

30121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 30121 is about 173.5540261705. The cubic root of 30121 is about 31.1140440357.

Adding to 30121 its reverse (12103), we get a palindrome (42224).

It can be divided in two parts, 30 and 121, that added together give a palindrome (151).

The spelling of 30121 in words is "thirty thousand, one hundred twenty-one".