2201221021001 has 4 divisors (see below), whose sum is σ = 2210833340100. Its totient is φ = 2191608701904.

The previous prime is 2201221020961. The next prime is 2201221021033. The reversal of 2201221021001 is 1001201221022.

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 1562372502601 + 638848518400 = 1249949^2 + 799280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201221021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201221021061) 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, 4806159206 + ... + 4806159663.

It is an arithmetic number, because the mean of its divisors is an integer number (552708335025).

Almost surely, 2^{2201221021001} is an apocalyptic number.

It is an amenable number.

2201221021001 is a deficient number, since it is larger than the sum of its proper divisors (9612319099).

2201221021001 is an equidigital number, since it uses as much as digits as its factorization.

2201221021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9612319098.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2201221021001 its reverse (1001201221022), we get a palindrome (3202422242023).

The spelling of 2201221021001 in words is "two trillion, two hundred one billion, two hundred twenty-one million, twenty-one thousand, one".