1131020210311 has 4 divisors (see below), whose sum is σ = 1131580956112. Its totient is φ = 1130459464512.

The previous prime is 1131020210297. The next prime is 1131020210377. The reversal of 1131020210311 is 1130120201311.

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 1131020210311 - 2¹⁹ = 1131019686023 is a prime.

It is a super-2 number, since 2×1131020210311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131080210311) 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, 280369875 + ... + 280373908.

It is an arithmetic number, because the mean of its divisors is an integer number (282895239028).

Almost surely, 2^{1131020210311} is an apocalyptic number.

1131020210311 is a deficient number, since it is larger than the sum of its proper divisors (560745801).

1131020210311 is an equidigital number, since it uses as much as digits as its factorization.

1131020210311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560745800.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1131020210311 its reverse (1130120201311), we get a palindrome (2261140411622).

The spelling of 1131020210311 in words is "one trillion, one hundred thirty-one billion, twenty million, two hundred ten thousand, three hundred eleven".