2001012200221 has 8 divisors (see below), whose sum is σ = 2167991331264. Its totient is φ = 1839507794880.

The previous prime is 2001012200219. The next prime is 2001012200249. The reversal of 2001012200221 is 1220022101002.

It is a happy number.

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 2001012200221 - 2¹ = 2001012200219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001012200251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368680665 + ... + 1368682126.

It is an arithmetic number, because the mean of its divisors is an integer number (270998916408).

Almost surely, 2^{2001012200221} is an apocalyptic number.

It is an amenable number.

2001012200221 is a deficient number, since it is larger than the sum of its proper divisors (166979131043).

2001012200221 is a wasteful number, since it uses less digits than its factorization.

2001012200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737362851.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001012200221 its reverse (1220022101002), we get a palindrome (3221034301223).

The spelling of 2001012200221 in words is "two trillion, one billion, twelve million, two hundred thousand, two hundred twenty-one".