12122201020021 has 2 divisors, whose sum is σ = 12122201020022. Its totient is φ = 12122201020020.

The previous prime is 12122201019997. The next prime is 12122201020031. The reversal of 12122201020021 is 12002010222121.

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., 11000266722225 + 1121934297796 = 3316665^2 + 1059214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122201020021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122201019977 and 12122201020004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122201020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061100510010 + 6061100510011.

It is an arithmetic number, because the mean of its divisors is an integer number (6061100510011).

Almost surely, 2^{12122201020021} is an apocalyptic number.

It is an amenable number.

12122201020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122201020021 is an equidigital number, since it uses as much as digits as its factorization.

12122201020021 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 12122201020021 its reverse (12002010222121), we get a palindrome (24124211242142).

The spelling of 12122201020021 in words is "twelve trillion, one hundred twenty-two billion, two hundred one million, twenty thousand, twenty-one".