11212222201111 has 4 divisors (see below), whose sum is σ = 11212249838112. Its totient is φ = 11212194564112.

The previous prime is 11212222201097. The next prime is 11212222201153. The reversal of 11212222201111 is 11110222221211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11212222201111 - 2³⁷ = 11074783247639 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 (11212222204111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200751 + ... + 14024416.

It is an arithmetic number, because the mean of its divisors is an integer number (2803062459528).

Almost surely, 2^{11212222201111} is an apocalyptic number.

11212222201111 is a deficient number, since it is larger than the sum of its proper divisors (27637001).

11212222201111 is an equidigital number, since it uses as much as digits as its factorization.

11212222201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27637000.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11212222201111 its reverse (11110222221211), we get a palindrome (22322444422322).

The spelling of 11212222201111 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-two million, two hundred one thousand, one hundred eleven".