12020201220121 has 2 divisors, whose sum is σ = 12020201220122. Its totient is φ = 12020201220120.

The previous prime is 12020201220103. The next prime is 12020201220149. The reversal of 12020201220121 is 12102210202021.

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., 10367343866896 + 1652857353225 = 3219836^2 + 1285635^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020201220121 - 2⁵ = 12020201220089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020201220095 and 12020201220104.

It is not a weakly prime, because it can be changed into another prime (12020201200121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010100610060 + 6010100610061.

It is an arithmetic number, because the mean of its divisors is an integer number (6010100610061).

Almost surely, 2^{12020201220121} is an apocalyptic number.

It is an amenable number.

12020201220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020201220121 is an equidigital number, since it uses as much as digits as its factorization.

12020201220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12020201220121 its reverse (12102210202021), we get a palindrome (24122411422142).

The spelling of 12020201220121 in words is "twelve trillion, twenty billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".