30020121121 has 4 divisors (see below), whose sum is σ = 30091428244. Its totient is φ = 29948814000.

The previous prime is 30020121101. The next prime is 30020121137. The reversal of 30020121121 is 12112102003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12112102003 = 3853 ⋅3143551.

It can be written as a sum of positive squares in 2 ways, for example, as 68973025 + 29951148096 = 8305^2 + 173064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30020121121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30020121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35652930 + ... + 35653771.

It is an arithmetic number, because the mean of its divisors is an integer number (7522857061).

Almost surely, 2^30020121121 is an apocalyptic number.

It is an amenable number.

30020121121 is a deficient number, since it is larger than the sum of its proper divisors (71307123).

30020121121 is an equidigital number, since it uses as much as digits as its factorization.

30020121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71307122.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 30020121121 its reverse (12112102003), we get a palindrome (42132223124).

The spelling of 30020121121 in words is "thirty billion, twenty million, one hundred twenty-one thousand, one hundred twenty-one".