2011211222221 has 8 divisors (see below), whose sum is σ = 2020315518144. Its totient is φ = 2002113199680.

The previous prime is 2011211222171. The next prime is 2011211222239. The reversal of 2011211222221 is 1222221121102.

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 2011211222221 - 2⁹ = 2011211221709 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 (2011211222281) 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, 925111 + ... + 2208676.

It is an arithmetic number, because the mean of its divisors is an integer number (252539439768).

Almost surely, 2^{2011211222221} is an apocalyptic number.

It is an amenable number.

2011211222221 is a deficient number, since it is larger than the sum of its proper divisors (9104295923).

2011211222221 is a wasteful number, since it uses less digits than its factorization.

2011211222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136691.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2011211222221 its reverse (1222221121102), we get a palindrome (3233432343323).

The spelling of 2011211222221 in words is "two trillion, eleven billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".