1131131212011 has 8 divisors (see below), whose sum is σ = 1675749943760. Its totient is φ = 754087474656.

The previous prime is 1131131212007. The next prime is 1131131212019. The reversal of 1131131212011 is 1102121311311.

1131131212011 is a `hidden beast` number, since 11 + 311 + 312 + 1 + 20 + 11 = 666.

It is not a de Polignac number, because 1131131212011 - 2² = 1131131212007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131131212019) 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, 20946874270 + ... + 20946874323.

It is an arithmetic number, because the mean of its divisors is an integer number (209468742970).

Almost surely, 2^{1131131212011} is an apocalyptic number.

1131131212011 is a deficient number, since it is larger than the sum of its proper divisors (544618731749).

1131131212011 is an equidigital number, since it uses as much as digits as its factorization.

1131131212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41893748602 (or 41893748596 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1131131212011 its reverse (1102121311311), we get a palindrome (2233252523322).

The spelling of 1131131212011 in words is "one trillion, one hundred thirty-one billion, one hundred thirty-one million, two hundred twelve thousand, eleven".