1131011111011 has 4 divisors (see below), whose sum is σ = 1157313695032. Its totient is φ = 1104708526992.

The previous prime is 1131011111003. The next prime is 1131011111047. The reversal of 1131011111011 is 1101111101311.

It is a happy number.

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 1131011111011 - 2³ = 1131011111003 is a prime.

It is a super-2 number, since 2×1131011111011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131011110982 and 1131011111000.

It is not an unprimeable number, because it can be changed into a prime (1131011111081) 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, 13151291946 + ... + 13151292031.

It is an arithmetic number, because the mean of its divisors is an integer number (289328423758).

Almost surely, 2^{1131011111011} is an apocalyptic number.

1131011111011 is a deficient number, since it is larger than the sum of its proper divisors (26302584021).

1131011111011 is an equidigital number, since it uses as much as digits as its factorization.

1131011111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26302584020.

The product of its (nonzero) digits is 3, while the sum is 13.

Adding to 1131011111011 its reverse (1101111101311), we get a palindrome (2232122212322).

The spelling of 1131011111011 in words is "one trillion, one hundred thirty-one billion, eleven million, one hundred eleven thousand, eleven".