12212201122021 has 2 divisors, whose sum is σ = 12212201122022. Its totient is φ = 12212201122020.

The previous prime is 12212201122019. The next prime is 12212201122127. The reversal of 12212201122021 is 12022110221221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11713581545121 + 498619576900 = 3422511^2 + 706130^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212201122021 - 2¹ = 12212201122019 is a prime.

It is a super-2 number, since 2×12212201122021² (a number of 27 digits) contains 22 as substring.

Together with 12212201122019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12212201122021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212201122001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106100561010 + 6106100561011.

It is an arithmetic number, because the mean of its divisors is an integer number (6106100561011).

Almost surely, 2^{12212201122021} is an apocalyptic number.

It is an amenable number.

12212201122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212201122021 is an equidigital number, since it uses as much as digits as its factorization.

12212201122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12212201122021 its reverse (12022110221221), we get a palindrome (24234311343242).

The spelling of 12212201122021 in words is "twelve trillion, two hundred twelve billion, two hundred one million, one hundred twenty-two thousand, twenty-one".