10221219997 has 2 divisors, whose sum is σ = 10221219998. Its totient is φ = 10221219996.

The previous prime is 10221219979. The next prime is 10221220073. The reversal of 10221219997 is 79991212201.

10221219997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (10221219979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9010945476 + 1210274521 = 94926^2 + 34789^2 .

It is an emirp because it is prime and its reverse (79991212201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221219997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221219937) 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, 5110609998 + 5110609999.

It is an arithmetic number, because the mean of its divisors is an integer number (5110609999).

Almost surely, 2^10221219997 is an apocalyptic number.

It is an amenable number.

10221219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221219997 is an equidigital number, since it uses as much as digits as its factorization.

10221219997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 10221219997 in words is "ten billion, two hundred twenty-one million, two hundred nineteen thousand, nine hundred ninety-seven".