1131211100311 has 4 divisors (see below), whose sum is σ = 1132848164824. Its totient is φ = 1129574035800.

The previous prime is 1131211100303. The next prime is 1131211100321. The reversal of 1131211100311 is 1130011121311.

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 1131211100311 - 2³ = 1131211100303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131211100321) 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, 818531220 + ... + 818532601.

It is an arithmetic number, because the mean of its divisors is an integer number (283212041206).

Almost surely, 2^{1131211100311} is an apocalyptic number.

1131211100311 is a deficient number, since it is larger than the sum of its proper divisors (1637064513).

1131211100311 is an equidigital number, since it uses as much as digits as its factorization.

1131211100311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637064512.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1131211100311 its reverse (1130011121311), we get a palindrome (2261222221622).

The spelling of 1131211100311 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, one hundred thousand, three hundred eleven".