1111001011011 has 8 divisors (see below), whose sum is σ = 1645927423760. Its totient is φ = 740667340656.

The previous prime is 1111001011007. The next prime is 1111001011013. The reversal of 1111001011011 is 1101101001111.

It is not a de Polignac number, because 1111001011011 - 2² = 1111001011007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111001010984 and 1111001011002.

It is not an unprimeable number, because it can be changed into a prime (1111001011013) 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, 20574092770 + ... + 20574092823.

It is an arithmetic number, because the mean of its divisors is an integer number (205740927970).

Almost surely, 2^{1111001011011} is an apocalyptic number.

1111001011011 is a deficient number, since it is larger than the sum of its proper divisors (534926412749).

1111001011011 is an equidigital number, since it uses as much as digits as its factorization.

1111001011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41148185602 (or 41148185596 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 1111001011011 its reverse (1101101001111), we get a palindrome (2212102012122).

The spelling of 1111001011011 in words is "one trillion, one hundred eleven billion, one million, eleven thousand, eleven".