12201021122021 has 2 divisors, whose sum is σ = 12201021122022. Its totient is φ = 12201021122020.

The previous prime is 12201021122011. The next prime is 12201021122071. The reversal of 12201021122021 is 12022112010221.

12201021122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10886627661121 + 1314393460900 = 3299489^2 + 1146470^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201021122021 - 2³⁴ = 12183841252837 is a prime.

It is a super-2 number, since 2×12201021122021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12201021122011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100510561010 + 6100510561011.

It is an arithmetic number, because the mean of its divisors is an integer number (6100510561011).

Almost surely, 2^{12201021122021} is an apocalyptic number.

It is an amenable number.

12201021122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12201021122021 is an equidigital number, since it uses as much as digits as its factorization.

12201021122021 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 17.

Adding to 12201021122021 its reverse (12022112010221), we get a palindrome (24223133132242).

The spelling of 12201021122021 in words is "twelve trillion, two hundred one billion, twenty-one million, one hundred twenty-two thousand, twenty-one".