30202131121 has 4 divisors (see below), whose sum is σ = 30202664292. Its totient is φ = 30201597952.

The previous prime is 30202131119. The next prime is 30202131139. The reversal of 30202131121 is 12113120203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12113120203 = 31 ⋅390745813.

It can be written as a sum of positive squares in 2 ways, for example, as 20068688896 + 10133442225 = 141664^2 + 100665^2 .

It is a cyclic number.

It is not a de Polignac number, because 30202131121 - 2¹ = 30202131119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30202131095 and 30202131104.

It is not an unprimeable number, because it can be changed into a prime (30202141121) 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, 169936 + ... + 298801.

It is an arithmetic number, because the mean of its divisors is an integer number (7550666073).

Almost surely, 2^30202131121 is an apocalyptic number.

It is an amenable number.

30202131121 is a deficient number, since it is larger than the sum of its proper divisors (533171).

30202131121 is an equidigital number, since it uses as much as digits as its factorization.

30202131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533170.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30202131121 its reverse (12113120203), we get a palindrome (42315251324).

The spelling of 30202131121 in words is "thirty billion, two hundred two million, one hundred thirty-one thousand, one hundred twenty-one".