1111111201211 has 32 divisors (see below), whose sum is σ = 1264441052160. Its totient is φ = 967436870400.

The previous prime is 1111111201181. The next prime is 1111111201247. The reversal of 1111111201211 is 1121021111111.

It is a de Polignac number, because none of the positive numbers 2^k-1111111201211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111111221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46892255 + ... + 46915943.

It is an arithmetic number, because the mean of its divisors is an integer number (39513782880).

Almost surely, 2^{1111111201211} is an apocalyptic number.

1111111201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111111201211 is a deficient number, since it is larger than the sum of its proper divisors (153329850949).

1111111201211 is a wasteful number, since it uses less digits than its factorization.

1111111201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25667.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 1111111201211 its reverse (1121021111111), we get a palindrome (2232132312322).

The spelling of 1111111201211 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred one thousand, two hundred eleven".