20123320001231 has 4 divisors (see below), whose sum is σ = 20301402479232. Its totient is φ = 19945237523232.

The previous prime is 20123320001209. The next prime is 20123320001261. The reversal of 20123320001231 is 13210002332102.

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

It is a cyclic number.

It is not a de Polignac number, because 20123320001231 - 2³⁴ = 20106140132047 is a prime.

It is a super-2 number, since 2×20123320001231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123320001261) 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, 89041238831 + ... + 89041239056.

It is an arithmetic number, because the mean of its divisors is an integer number (5075350619808).

Almost surely, 2^{20123320001231} is an apocalyptic number.

20123320001231 is a deficient number, since it is larger than the sum of its proper divisors (178082478001).

20123320001231 is a wasteful number, since it uses less digits than its factorization.

20123320001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178082478000.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20123320001231 its reverse (13210002332102), we get a palindrome (33333322333333).

The spelling of 20123320001231 in words is "twenty trillion, one hundred twenty-three billion, three hundred twenty million, one thousand, two hundred thirty-one".