20203021123231 has 4 divisors (see below), whose sum is σ = 20203031239192. Its totient is φ = 20203011007272.

The previous prime is 20203021123223. The next prime is 20203021123261. The reversal of 20203021123231 is 13232112030202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20203021123231 - 2³ = 20203021123223 is a prime.

It is a super-2 number, since 2×20203021123231² (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 (20203021123261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950280 + ... + 6427213.

It is an arithmetic number, because the mean of its divisors is an integer number (5050757809798).

Almost surely, 2^{20203021123231} is an apocalyptic number.

20203021123231 is a deficient number, since it is larger than the sum of its proper divisors (10115961).

20203021123231 is an equidigital number, since it uses as much as digits as its factorization.

20203021123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115960.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20203021123231 its reverse (13232112030202), we get a palindrome (33435133153433).

The spelling of 20203021123231 in words is "twenty trillion, two hundred three billion, twenty-one million, one hundred twenty-three thousand, two hundred thirty-one".