20013003331121 has 2 divisors, whose sum is σ = 20013003331122. Its totient is φ = 20013003331120.

The previous prime is 20013003331091. The next prime is 20013003331199. The reversal of 20013003331121 is 12113330031002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19997487141025 + 15516190096 = 4471855^2 + 124564^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013003331121 - 2³⁴ = 19995823461937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013003331093 and 20013003331102.

It is not a weakly prime, because it can be changed into another prime (20013003333121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006501665560 + 10006501665561.

It is an arithmetic number, because the mean of its divisors is an integer number (10006501665561).

Almost surely, 2^{20013003331121} is an apocalyptic number.

It is an amenable number.

20013003331121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013003331121 is an equidigital number, since it uses as much as digits as its factorization.

20013003331121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20013003331121 its reverse (12113330031002), we get a palindrome (32126333362123).

The spelling of 20013003331121 in words is "twenty trillion, thirteen billion, three million, three hundred thirty-one thousand, one hundred twenty-one".