20113312212231 has 16 divisors (see below), whose sum is σ = 31477204184064. Its totient is φ = 11182690959264.

The previous prime is 20113312212173. The next prime is 20113312212251. The reversal of 20113312212231 is 13221221331102.

It is not a de Polignac number, because 20113312212231 - 2⁶ = 20113312212167 is a prime.

It is a super-2 number, since 2×20113312212231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113312212251) 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 15 ways as a sum of consecutive naturals, for example, 12942928575 + ... + 12942930128.

It is an arithmetic number, because the mean of its divisors is an integer number (1967325261504).

Almost surely, 2^{20113312212231} is an apocalyptic number.

20113312212231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20113312212231 is a deficient number, since it is larger than the sum of its proper divisors (11363891971833).

20113312212231 is a wasteful number, since it uses less digits than its factorization.

20113312212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25885858750.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20113312212231 its reverse (13221221331102), we get a palindrome (33334533543333).

The spelling of 20113312212231 in words is "twenty trillion, one hundred thirteen billion, three hundred twelve million, two hundred twelve thousand, two hundred thirty-one".