2211212101111 has 16 divisors (see below), whose sum is σ = 2506690650240. Its totient is φ = 1933650321120.

The previous prime is 2211212101081. The next prime is 2211212101129. The reversal of 2211212101111 is 1111012121122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211212101111 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 (2211212101141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20418096 + ... + 20526106.

It is an arithmetic number, because the mean of its divisors is an integer number (156668165640).

Almost surely, 2^{2211212101111} is an apocalyptic number.

2211212101111 is a deficient number, since it is larger than the sum of its proper divisors (295478549129).

2211212101111 is a wasteful number, since it uses less digits than its factorization.

2211212101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190926.

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

Adding to 2211212101111 its reverse (1111012121122), we get a palindrome (3322224222233).

It can be divided in two parts, 221121 and 2101111, that added together give a palindrome (2322232).

The spelling of 2211212101111 in words is "two trillion, two hundred eleven billion, two hundred twelve million, one hundred one thousand, one hundred eleven".