1111211111011 has 4 divisors (see below), whose sum is σ = 1111213926712. Its totient is φ = 1111208295312.

The previous prime is 1111211110991. The next prime is 1111211111029. The reversal of 1111211111011 is 1101111121111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111211111011 - 2²⁹ = 1110674240099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211110982 and 1111211111000.

It is not an unprimeable number, because it can be changed into a prime (1111211111071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695850 + ... + 1645183.

It is an arithmetic number, because the mean of its divisors is an integer number (277803481678).

Almost surely, 2^{1111211111011} is an apocalyptic number.

1111211111011 is a deficient number, since it is larger than the sum of its proper divisors (2815701).

1111211111011 is an equidigital number, since it uses as much as digits as its factorization.

1111211111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815700.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 1111211111011 its reverse (1101111121111), we get a palindrome (2212322232122).

The spelling of 1111211111011 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred eleven thousand, eleven".