1131321020233 has 4 divisors (see below), whose sum is σ = 1132078771908. Its totient is φ = 1130563268560.

The previous prime is 1131321020209. The next prime is 1131321020239. The reversal of 1131321020233 is 3320201231311.

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 388773449289 + 742547570944 = 623517^2 + 861712^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131321020233 - 2²¹ = 1131318923081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131321020239) 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, 378873598 + ... + 378876583.

It is an arithmetic number, because the mean of its divisors is an integer number (283019692977).

Almost surely, 2^{1131321020233} is an apocalyptic number.

It is an amenable number.

1131321020233 is a deficient number, since it is larger than the sum of its proper divisors (757751675).

1131321020233 is an equidigital number, since it uses as much as digits as its factorization.

1131321020233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757751674.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1131321020233 its reverse (3320201231311), we get a palindrome (4451522251544).

The spelling of 1131321020233 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, twenty thousand, two hundred thirty-three".