2001221000211 has 8 divisors (see below), whose sum is σ = 2668838238160. Its totient is φ = 1333875547872.

The previous prime is 2001221000189. The next prime is 2001221000263. The reversal of 2001221000211 is 1120001221002.

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

It is not a de Polignac number, because 2001221000211 - 2¹³ = 2001220992019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001221001211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67929220 + ... + 67958673.

It is an arithmetic number, because the mean of its divisors is an integer number (333604779770).

Almost surely, 2^{2001221000211} is an apocalyptic number.

2001221000211 is a deficient number, since it is larger than the sum of its proper divisors (667617237949).

2001221000211 is a wasteful number, since it uses less digits than its factorization.

2001221000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135892805.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001221000211 its reverse (1120001221002), we get a palindrome (3121222221213).

The spelling of 2001221000211 in words is "two trillion, one billion, two hundred twenty-one million, two hundred eleven", and thus it is an aban number.