2001222010221 has 16 divisors (see below), whose sum is σ = 3050398953984. Its totient is φ = 1143211261104.

The previous prime is 2001222010213. The next prime is 2001222010223. The reversal of 2001222010221 is 1220102221002.

It is not a de Polignac number, because 2001222010221 - 2³ = 2001222010213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001222010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222010223) 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, 14269111 + ... + 14408676.

It is an arithmetic number, because the mean of its divisors is an integer number (190649934624).

Almost surely, 2^{2001222010221} is an apocalyptic number.

2001222010221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2001222010221 is a deficient number, since it is larger than the sum of its proper divisors (1049176943763).

2001222010221 is a wasteful number, since it uses less digits than its factorization.

2001222010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28681120.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2001222010221 its reverse (1220102221002), we get a palindrome (3221324231223).

The spelling of 2001222010221 in words is "two trillion, one billion, two hundred twenty-two million, ten thousand, two hundred twenty-one".