211111220000001 has 16 divisors (see below), whose sum is σ = 281772092796480. Its totient is φ = 140595592695360.

The previous prime is 211111219999997. The next prime is 211111220000039. The reversal of 211111220000001 is 100000022111112.

It is not a de Polignac number, because 211111220000001 - 2² = 211111219999997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211111220070001) 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, 66930115 + ... + 70013303.

It is an arithmetic number, because the mean of its divisors is an integer number (17610755799780).

Almost surely, 2^{211111220000001} is an apocalyptic number.

It is an amenable number.

211111220000001 is a deficient number, since it is larger than the sum of its proper divisors (70660872796479).

211111220000001 is a wasteful number, since it uses less digits than its factorization.

211111220000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106736.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211111220000001 its reverse (100000022111112), we get a palindrome (311111242111113).

The spelling of 211111220000001 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty million, one", and thus it is an aban number.