2011221221111 has 8 divisors (see below), whose sum is σ = 2014531957200. Its totient is φ = 2007912741120.

The previous prime is 2011221221081. The next prime is 2011221221173. The reversal of 2011221221111 is 1111221221102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011221221111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011221221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221221411) 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, 1225025 + ... + 2350133.

It is an arithmetic number, because the mean of its divisors is an integer number (251816494650).

Almost surely, 2^{2011221221111} is an apocalyptic number.

2011221221111 is a deficient number, since it is larger than the sum of its proper divisors (3310736089).

2011221221111 is a wasteful number, since it uses less digits than its factorization.

2011221221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128049.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2011221221111 its reverse (1111221221102), we get a palindrome (3122442442213).

Subtracting from 2011221221111 its reverse (1111221221102), we obtain a palindrome (900000000009).

The spelling of 2011221221111 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".