1111111111211 has 8 divisors (see below), whose sum is σ = 1181170750800. Its totient is φ = 1042209482400.

The previous prime is 1111111111183. The next prime is 1111111111219. The reversal of 1111111111211 is 1121111111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111111111211 - 2¹⁸ = 1111110849067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111111111219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289500716 + ... + 289504553.

It is an arithmetic number, because the mean of its divisors is an integer number (147646343850).

Almost surely, 2^{1111111111211} is an apocalyptic number.

1111111111211 is a deficient number, since it is larger than the sum of its proper divisors (70059639589).

1111111111211 is a wasteful number, since it uses less digits than its factorization.

1111111111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579005389.

The product of its digits is 2, while the sum is 14.

Adding to 1111111111211 its reverse (1121111111111), we get a palindrome (2232222222322).

It can be divided in two parts, 11111111 and 11211, that multiplied together give a palindrome (124566665421).

The spelling of 1111111111211 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, two hundred eleven".