20031233212231 has 4 divisors (see below), whose sum is σ = 20072365108432. Its totient is φ = 19990101316032.

The previous prime is 20031233212229. The next prime is 20031233212247. The reversal of 20031233212231 is 13221233213002.

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 20031233212231 - 2¹ = 20031233212229 is a prime.

It is a super-2 number, since 2×20031233212231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20031233212196 and 20031233212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031233212261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20565947370 + ... + 20565948343.

It is an arithmetic number, because the mean of its divisors is an integer number (5018091277108).

Almost surely, 2^{20031233212231} is an apocalyptic number.

20031233212231 is a deficient number, since it is larger than the sum of its proper divisors (41131896201).

20031233212231 is an equidigital number, since it uses as much as digits as its factorization.

20031233212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41131896200.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 20031233212231 its reverse (13221233213002), we get a palindrome (33252466425233).

The spelling of 20031233212231 in words is "twenty trillion, thirty-one billion, two hundred thirty-three million, two hundred twelve thousand, two hundred thirty-one".