1131231121133 has 4 divisors (see below), whose sum is σ = 1131292350108. Its totient is φ = 1131169892160.

The previous prime is 1131231121129. The next prime is 1131231121243. The reversal of 1131231121133 is 3311211321311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 910845001924 + 220386119209 = 954382^2 + 469453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131231121133 - 2² = 1131231121129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131231121099 and 1131231121108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231121103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30586766 + ... + 30623727.

It is an arithmetic number, because the mean of its divisors is an integer number (282823087527).

Almost surely, 2^{1131231121133} is an apocalyptic number.

It is an amenable number.

1131231121133 is a deficient number, since it is larger than the sum of its proper divisors (61228975).

1131231121133 is an equidigital number, since it uses as much as digits as its factorization.

1131231121133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61228974.

The product of its digits is 324, while the sum is 23.

Adding to 1131231121133 its reverse (3311211321311), we get a palindrome (4442442442444).

The spelling of 1131231121133 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-three".