12011200122221 has 2 divisors, whose sum is σ = 12011200122222. Its totient is φ = 12011200122220.

The previous prime is 12011200122217. The next prime is 12011200122227. The reversal of 12011200122221 is 12222100211021.

12011200122221 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., 11947323120100 + 63877002121 = 3456490^2 + 252739^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011200122221 - 2² = 12011200122217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011200122221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011200122227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005600061110 + 6005600061111.

It is an arithmetic number, because the mean of its divisors is an integer number (6005600061111).

Almost surely, 2^{12011200122221} is an apocalyptic number.

It is an amenable number.

12011200122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011200122221 is an equidigital number, since it uses as much as digits as its factorization.

12011200122221 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 12011200122221 its reverse (12222100211021), we get a palindrome (24233300333242).

The spelling of 12011200122221 in words is "twelve trillion, eleven billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".