2111122201111 has 64 divisors (see below), whose sum is σ = 2714288818176. Its totient is φ = 1594646784000.

The previous prime is 2111122201109. The next prime is 2111122201117. The reversal of 2111122201111 is 1111022211112.

It is a cyclic number.

It is not a de Polignac number, because 2111122201111 - 2¹ = 2111122201109 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 (2111122201117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77764206 + ... + 77791348.

It is an arithmetic number, because the mean of its divisors is an integer number (42410762784).

Almost surely, 2^{2111122201111} is an apocalyptic number.

2111122201111 is a deficient number, since it is larger than the sum of its proper divisors (603166617065).

2111122201111 is a wasteful number, since it uses less digits than its factorization.

2111122201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27472.

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

Adding to 2111122201111 its reverse (1111022211112), we get a palindrome (3222144412223).

It can be divided in two parts, 21111 and 22201111, that added together give a palindrome (22222222).

The spelling of 2111122201111 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, two hundred one thousand, one hundred eleven".