11111122012211 has 16 divisors (see below), whose sum is σ = 12669935844384. Its totient is φ = 9652918500864.

The previous prime is 11111122012069. The next prime is 11111122012231. The reversal of 11111122012211 is 11221022111111.

It is a cyclic number.

It is not a de Polignac number, because 11111122012211 - 2²² = 11111117817907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 11111122012211.

It is not an unprimeable number, because it can be changed into a prime (11111122012231) 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, 11939240 + ... + 12836186.

It is an arithmetic number, because the mean of its divisors is an integer number (791870990274).

Almost surely, 2^{11111122012211} is an apocalyptic number.

11111122012211 is a deficient number, since it is larger than the sum of its proper divisors (1558813832173).

11111122012211 is a wasteful number, since it uses less digits than its factorization.

11111122012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953030.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11111122012211 its reverse (11221022111111), we get a palindrome (22332144123322).

The spelling of 11111122012211 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, twelve thousand, two hundred eleven".