12222212121001 has 4 divisors (see below), whose sum is σ = 12222307799892. Its totient is φ = 12222116442112.

The previous prime is 12222212120917. The next prime is 12222212121047. The reversal of 12222212121001 is 10012121222221.

12222212121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8232509485225 + 3989702635776 = 2869235^2 + 1997424^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222212121001 - 2¹⁹ = 12222211596713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12222212121001.

It is not an unprimeable number, because it can be changed into a prime (12222212121071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47647576 + ... + 47903401.

It is an arithmetic number, because the mean of its divisors is an integer number (3055576949973).

Almost surely, 2^{12222212121001} is an apocalyptic number.

It is an amenable number.

12222212121001 is a deficient number, since it is larger than the sum of its proper divisors (95678891).

12222212121001 is an equidigital number, since it uses as much as digits as its factorization.

12222212121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95678890.

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

Adding to 12222212121001 its reverse (10012121222221), we get a palindrome (22234333343222).

The spelling of 12222212121001 in words is "twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, one".