22212121201 has 2 divisors, whose sum is σ = 22212121202. Its totient is φ = 22212121200.

The previous prime is 22212121123. The next prime is 22212121207. The reversal of 22212121201 is 10212121222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20384986176 + 1827135025 = 142776^2 + 42745^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212121201 - 2⁷ = 22212121073 is a prime.

It is not a weakly prime, because it can be changed into another prime (22212121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106060600 + 11106060601.

It is an arithmetic number, because the mean of its divisors is an integer number (11106060601).

Almost surely, 2^22212121201 is an apocalyptic number.

It is an amenable number.

22212121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212121201 is an equidigital number, since it uses as much as digits as its factorization.

22212121201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22212121201 its reverse (10212121222), we get a palindrome (32424242423).

The spelling of 22212121201 in words is "twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred one".