30181121 has 4 divisors (see below), whose sum is σ = 30192132. Its totient is φ = 30170112.

The previous prime is 30181117. The next prime is 30181127. The reversal of 30181121 is 12118103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 24611521 + 5569600 = 4961^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 30181121 - 2² = 30181117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30181121.

It is not an unprimeable number, because it can be changed into a prime (30181127) 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, 2225 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (7548033).

Almost surely, 2^30181121 is an apocalyptic number.

It is an amenable number.

30181121 is a deficient number, since it is larger than the sum of its proper divisors (11011).

30181121 is an equidigital number, since it uses as much as digits as its factorization.

30181121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 30181121 is about 5493.7347041880. The cubic root of 30181121 is about 311.3473131091.

Adding to 30181121 its reverse (12118103), we get a palindrome (42299224).

The spelling of 30181121 in words is "thirty million, one hundred eighty-one thousand, one hundred twenty-one".