1001221000211 has 32 divisors (see below), whose sum is σ = 1029221303040. Its totient is φ = 973762448256.

The previous prime is 1001221000183. The next prime is 1001221000217. The reversal of 1001221000211 is 1120001221001.

It is a cyclic number.

It is not a de Polignac number, because 1001221000211 - 2²² = 1001216805907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001221000192 and 1001221000201.

It is not an unprimeable number, because it can be changed into a prime (1001221000217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 809393885 + ... + 809395121.

It is an arithmetic number, because the mean of its divisors is an integer number (32163165720).

Almost surely, 2^{1001221000211} is an apocalyptic number.

1001221000211 is a deficient number, since it is larger than the sum of its proper divisors (28000302829).

1001221000211 is a wasteful number, since it uses less digits than its factorization.

1001221000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001221000211 its reverse (1120001221001), we get a palindrome (2121222221212).

The spelling of 1001221000211 in words is "one trillion, one billion, two hundred twenty-one million, two hundred eleven", and thus it is an aban number.