211122012101111 has 16 divisors (see below), whose sum is σ = 215652515962464. Its totient is φ = 206611795488384.

The previous prime is 211122012101107. The next prime is 211122012101137. The reversal of 211122012101111 is 111101210221112.

It is a cyclic number.

It is not a de Polignac number, because 211122012101111 - 2² = 211122012101107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211122012101111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122012109111) 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, 1102179101 + ... + 1102370633.

It is an arithmetic number, because the mean of its divisors is an integer number (13478282247654).

Almost surely, 2^{211122012101111} is an apocalyptic number.

211122012101111 is a deficient number, since it is larger than the sum of its proper divisors (4530503861353).

211122012101111 is a wasteful number, since it uses less digits than its factorization.

211122012101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244370.

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

Adding to 211122012101111 its reverse (111101210221112), we get a palindrome (322223222322223).

The spelling of 211122012101111 in words is "two hundred eleven trillion, one hundred twenty-two billion, twelve million, one hundred one thousand, one hundred eleven".