1601002221121 has 8 divisors (see below), whose sum is σ = 1624881494880. Its totient is φ = 1577232235392.

The previous prime is 1601002221107. The next prime is 1601002221191. The reversal of 1601002221121 is 1211222001061.

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

It is a cyclic number.

It is not a de Polignac number, because 1601002221121 - 2¹⁵ = 1601002188353 is a prime.

It is a super-2 number, since 2×1601002221121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601002221191) 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 7 ways as a sum of consecutive naturals, for example, 27292491 + ... + 27351088.

It is an arithmetic number, because the mean of its divisors is an integer number (203110186860).

Almost surely, 2^{1601002221121} is an apocalyptic number.

It is an amenable number.

1601002221121 is a deficient number, since it is larger than the sum of its proper divisors (23879273759).

1601002221121 is an equidigital number, since it uses as much as digits as its factorization.

1601002221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54644015.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1601002221121 its reverse (1211222001061), we get a palindrome (2812224222182).

The spelling of 1601002221121 in words is "one trillion, six hundred one billion, two million, two hundred twenty-one thousand, one hundred twenty-one".