2011221210111 has 16 divisors (see below), whose sum is σ = 2755462399200. Its totient is φ = 1303932809088.

The previous prime is 2011221210101. The next prime is 2011221210151. The reversal of 2011221210111 is 1110121221102.

It is a happy number.

It is not a de Polignac number, because 2011221210111 - 2¹³ = 2011221201919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221210101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4239816 + ... + 4690253.

It is an arithmetic number, because the mean of its divisors is an integer number (172216399950).

Almost surely, 2^{2011221210111} is an apocalyptic number.

2011221210111 is a deficient number, since it is larger than the sum of its proper divisors (744241189089).

2011221210111 is a wasteful number, since it uses less digits than its factorization.

2011221210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932138.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2011221210111 its reverse (1110121221102), we get a palindrome (3121342431213).

It can be divided in two parts, 2011 and 221210111, that added together give a palindrome (221212122).

The spelling of 2011221210111 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred eleven".