1220002221001 has 2 divisors, whose sum is σ = 1220002221002. Its totient is φ = 1220002221000.

The previous prime is 1220002220999. The next prime is 1220002221041. The reversal of 1220002221001 is 1001222000221.

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., 948247488400 + 271754732601 = 973780^2 + 521301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220002221001 - 2¹ = 1220002220999 is a prime.

Together with 1220002220999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1220002221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610001110500 + 610001110501.

It is an arithmetic number, because the mean of its divisors is an integer number (610001110501).

Almost surely, 2^{1220002221001} is an apocalyptic number.

It is an amenable number.

1220002221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002221001 is an equidigital number, since it uses as much as digits as its factorization.

1220002221001 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 13.

Adding to 1220002221001 its reverse (1001222000221), we get a palindrome (2221224221222).

The spelling of 1220002221001 in words is "one trillion, two hundred twenty billion, two million, two hundred twenty-one thousand, one".