1111111111011 has 16 divisors (see below), whose sum is σ = 1620000499968.
Its totient is φ = 671801138400.
The previous prime is 1111111110971. The next prime is 1111111111049. The reversal of 1111111111011 is 1101111111111.
It is not a de Polignac number, because 1111111111011 - 210 = 1111111109987 is a prime.
It is not an unprimeable number, because it can be changed into a prime (1111111611011) 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, 39974271 + ... + 40002056.
It is an arithmetic number, because the mean of its divisors is an integer number (101250031248).
Almost surely, 21111111111011 is an apocalyptic number.
1111111111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
1111111111011 is a deficient number, since it is larger than the sum of its proper divisors (508889388957).
1111111111011 is a wasteful number, since it uses less digits than its factorization.
1111111111011 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 79976762.
The product of its (nonzero) digits is 1, while the sum is 12.
Adding to 1111111111011 its reverse (1101111111111), we get a palindrome (2212222222122).
It can be divided in two parts, 11111111 and 11011, that multiplied together give a palindrome (122344443221).
The spelling of 1111111111011 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, eleven".