20012101110121 has 2 divisors, whose sum is σ = 20012101110122. Its totient is φ = 20012101110120.

The previous prime is 20012101110073. The next prime is 20012101110149. The reversal of 20012101110121 is 12101110121002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13633263905625 + 6378837204496 = 3692325^2 + 2525636^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012101110121 - 2¹⁷ = 20012100979049 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012101110151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006050555060 + 10006050555061.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050555061).

Almost surely, 2^{20012101110121} is an apocalyptic number.

It is an amenable number.

20012101110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012101110121 is an equidigital number, since it uses as much as digits as its factorization.

20012101110121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20012101110121 its reverse (12101110121002), we get a palindrome (32113211231123).

The spelling of 20012101110121 in words is "twenty trillion, twelve billion, one hundred one million, one hundred ten thousand, one hundred twenty-one".