11221212012001 has 2 divisors, whose sum is σ = 11221212012002. Its totient is φ = 11221212012000.

The previous prime is 11221212011963. The next prime is 11221212012011. The reversal of 11221212012001 is 10021021212211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11220831762001 + 380250000 = 3349751^2 + 19500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221212012001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221212012011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610606006000 + 5610606006001.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606006001).

Almost surely, 2^{11221212012001} is an apocalyptic number.

It is an amenable number.

11221212012001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221212012001 is an equidigital number, since it uses as much as digits as its factorization.

11221212012001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11221212012001 its reverse (10021021212211), we get a palindrome (21242233224212).

The spelling of 11221212012001 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, twelve thousand, one".