10222211221 has 2 divisors, whose sum is σ = 10222211222. Its totient is φ = 10222211220.

The previous prime is 10222211201. The next prime is 10222211269. The reversal of 10222211221 is 12211222201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5459140996 + 4763070225 = 73886^2 + 69015^2 .

It is a cyclic number.

It is not a de Polignac number, because 10222211221 - 2¹³ = 10222203029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10222211195 and 10222211204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10222211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111105610 + 5111105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5111105611).

Almost surely, 2^10222211221 is an apocalyptic number.

It is an amenable number.

10222211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10222211221 is an equidigital number, since it uses as much as digits as its factorization.

10222211221 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 10222211221 its reverse (12211222201), we get a palindrome (22433433422).

The spelling of 10222211221 in words is "ten billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-one".