1231353001133 has 4 divisors (see below), whose sum is σ = 1231520562300. Its totient is φ = 1231185439968.

The previous prime is 1231353001103. The next prime is 1231353001139. The reversal of 1231353001133 is 3311003531321.

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 1033205162089 + 198147839044 = 1016467^2 + 445138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231353001133 - 2¹⁴ = 1231352984749 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 (1231353001139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83769560 + ... + 83784257.

It is an arithmetic number, because the mean of its divisors is an integer number (307880140575).

Almost surely, 2^{1231353001133} is an apocalyptic number.

It is an amenable number.

1231353001133 is a deficient number, since it is larger than the sum of its proper divisors (167561167).

1231353001133 is an equidigital number, since it uses as much as digits as its factorization.

1231353001133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167561166.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 1231353001133 its reverse (3311003531321), we get a palindrome (4542356532454).

The spelling of 1231353001133 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-three million, one thousand, one hundred thirty-three".