1220002110001 has 4 divisors (see below), whose sum is σ = 1224537434100. Its totient is φ = 1215466785904.

The previous prime is 1220002109993. The next prime is 1220002110013. The reversal of 1220002110001 is 1000112000221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43503947776 + 1176498162225 = 208576^2 + 1084665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220002110001 - 2³ = 1220002109993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220002110001.

It is not an unprimeable number, because it can be changed into a prime (1220002110071) 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 in 3 ways as a sum of consecutive naturals, for example, 2267661646 + ... + 2267662183.

It is an arithmetic number, because the mean of its divisors is an integer number (306134358525).

Almost surely, 2^{1220002110001} is an apocalyptic number.

It is an amenable number.

1220002110001 is a deficient number, since it is larger than the sum of its proper divisors (4535324099).

1220002110001 is an equidigital number, since it uses as much as digits as its factorization.

1220002110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535324098.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220002110001 its reverse (1000112000221), we get a palindrome (2220114110222).

The spelling of 1220002110001 in words is "one trillion, two hundred twenty billion, two million, one hundred ten thousand, one".