1601220221201 has 8 divisors (see below), whose sum is σ = 1670852891904. Its totient is φ = 1531588750560.

The previous prime is 1601220221191. The next prime is 1601220221261. The reversal of 1601220221201 is 1021220221061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601220221201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601220221261) 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 in 7 ways as a sum of consecutive naturals, for example, 3394925 + ... + 3837701.

It is an arithmetic number, because the mean of its divisors is an integer number (208856611488).

Almost surely, 2^{1601220221201} is an apocalyptic number.

It is an amenable number.

1601220221201 is a deficient number, since it is larger than the sum of its proper divisors (69632670703).

1601220221201 is a wasteful number, since it uses less digits than its factorization.

1601220221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600031.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1601220221201 its reverse (1021220221061), we get a palindrome (2622440442262).

The spelling of 1601220221201 in words is "one trillion, six hundred one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred one".