2111201221111 has 8 divisors (see below), whose sum is σ = 2134222323984. Its totient is φ = 2088256222080.

The previous prime is 2111201221109. The next prime is 2111201221127. The reversal of 2111201221111 is 1111221021112.

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 2111201221111 - 2¹ = 2111201221109 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 (2111201221711) 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, 18970176 + ... + 19081141.

It is an arithmetic number, because the mean of its divisors is an integer number (266777790498).

Almost surely, 2^{2111201221111} is an apocalyptic number.

2111201221111 is a deficient number, since it is larger than the sum of its proper divisors (23021102873).

2111201221111 is a wasteful number, since it uses less digits than its factorization.

2111201221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38051921.

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

Adding to 2111201221111 its reverse (1111221021112), we get a palindrome (3222422242223).

The spelling of 2111201221111 in words is "two trillion, one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, one hundred eleven".