2001011221333 has 16 divisors (see below), whose sum is σ = 2052542901760. Its totient is φ = 1950214299264.

The previous prime is 2001011221303. The next prime is 2001011221337. The reversal of 2001011221333 is 3331221101002.

It is a cyclic number.

It is not a de Polignac number, because 2001011221333 - 2⁵ = 2001011221301 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 2001011221333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001011221337) 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 15 ways as a sum of consecutive naturals, for example, 3193903 + ... + 3768691.

It is an arithmetic number, because the mean of its divisors is an integer number (128283931360).

Almost surely, 2^{2001011221333} is an apocalyptic number.

It is an amenable number.

2001011221333 is a deficient number, since it is larger than the sum of its proper divisors (51531680427).

2001011221333 is a wasteful number, since it uses less digits than its factorization.

2001011221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575428.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2001011221333 its reverse (3331221101002), we get a palindrome (5332232322335).

The spelling of 2001011221333 in words is "two trillion, one billion, eleven million, two hundred twenty-one thousand, three hundred thirty-three".