2001200220221 has 16 divisors (see below), whose sum is σ = 2211683616000. Its totient is φ = 1801071452928.

The previous prime is 2001200220199. The next prime is 2001200220233. The reversal of 2001200220221 is 1220220021002.

It is not a de Polignac number, because 2001200220221 - 2¹⁴ = 2001200203837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001200220196 and 2001200220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001200220421) 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, 618680 + ... + 2094078.

It is an arithmetic number, because the mean of its divisors is an integer number (138230226000).

Almost surely, 2^{2001200220221} is an apocalyptic number.

It is an amenable number.

2001200220221 is a deficient number, since it is larger than the sum of its proper divisors (210483395779).

2001200220221 is a wasteful number, since it uses less digits than its factorization.

2001200220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478908.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001200220221 its reverse (1220220021002), we get a palindrome (3221420241223).

The spelling of 2001200220221 in words is "two trillion, one billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".