1131021211311 has 48 divisors (see below), whose sum is σ = 1708582861440. Its totient is φ = 747641754720.

The previous prime is 1131021211297. The next prime is 1131021211349. The reversal of 1131021211311 is 1131121201311.

1131021211311 is a `hidden beast` number, since 1 + 1 + 310 + 21 + 21 + 1 + 311 = 666.

It is not a de Polignac number, because 1131021211311 - 2¹⁰ = 1131021210287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131021211361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13751436 + ... + 13833438.

It is an arithmetic number, because the mean of its divisors is an integer number (35595476280).

Almost surely, 2^{1131021211311} is an apocalyptic number.

1131021211311 is a deficient number, since it is larger than the sum of its proper divisors (577561650129).

1131021211311 is an equidigital number, since it uses as much as digits as its factorization.

1131021211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82498 (or 82486 counting only the distinct ones).

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

Adding to 1131021211311 its reverse (1131121201311), we get a palindrome (2262142412622).

The spelling of 1131021211311 in words is "one trillion, one hundred thirty-one billion, twenty-one million, two hundred eleven thousand, three hundred eleven".