20033020121 has 2 divisors, whose sum is σ = 20033020122. Its totient is φ = 20033020120.

The previous prime is 20033020103. The next prime is 20033020151. The reversal of 20033020121 is 12102033002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18813962896 + 1219057225 = 137164^2 + 34915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033020121 - 2²⁶ = 19965911257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20033020096 and 20033020105.

It is not a weakly prime, because it can be changed into another prime (20033020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016510060 + 10016510061.

It is an arithmetic number, because the mean of its divisors is an integer number (10016510061).

Almost surely, 2^20033020121 is an apocalyptic number.

It is an amenable number.

20033020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033020121 is an equidigital number, since it uses as much as digits as its factorization.

20033020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20033020121 its reverse (12102033002), we get a palindrome (32135053123).

The spelling of 20033020121 in words is "twenty billion, thirty-three million, twenty thousand, one hundred twenty-one".