20113231321233 has 10 divisors (see below), whose sum is σ = 30045691233074. Its totient is φ = 13408820880768.

The previous prime is 20113231321219. The next prime is 20113231321241. The reversal of 20113231321233 is 33212313231102.

20113231321233 is a `hidden beast` number, since 2 + 0 + 1 + 132 + 313 + 212 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19918297592064 + 194933729169 = 4462992^2 + 441513^2 .

It is not a de Polignac number, because 20113231321233 - 2⁸ = 20113231320977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113231321197 and 20113231321206.

It is not an unprimeable number, because it can be changed into a prime (20113231323233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124155748816 + ... + 124155748977.

Almost surely, 2^{20113231321233} is an apocalyptic number.

It is an amenable number.

20113231321233 is a deficient number, since it is larger than the sum of its proper divisors (9932459911841).

20113231321233 is an equidigital number, since it uses as much as digits as its factorization.

20113231321233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248311497805 (or 248311497796 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 20113231321233 its reverse (33212313231102), we get a palindrome (53325544552335).

The spelling of 20113231321233 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred thirty-three".