1231432100033 has 4 divisors (see below), whose sum is σ = 1244127276420. Its totient is φ = 1218736923648.

The previous prime is 1231432099957. The next prime is 1231432100051. The reversal of 1231432100033 is 3300012341321.

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 217820090944 + 1013612009089 = 466712^2 + 1006783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231432100033 - 2³² = 1227137132737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231432099981 and 1231432100008.

It is not an unprimeable number, because it can be changed into a prime (1231432100933) 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, 6347588048 + ... + 6347588241.

It is an arithmetic number, because the mean of its divisors is an integer number (311031819105).

Almost surely, 2^{1231432100033} is an apocalyptic number.

It is an amenable number.

1231432100033 is a deficient number, since it is larger than the sum of its proper divisors (12695176387).

1231432100033 is an equidigital number, since it uses as much as digits as its factorization.

1231432100033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12695176386.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1231432100033 its reverse (3300012341321), we get a palindrome (4531444441354).

The spelling of 1231432100033 in words is "one trillion, two hundred thirty-one billion, four hundred thirty-two million, one hundred thousand, thirty-three".