20123203312111 has 8 divisors (see below), whose sum is σ = 20290384898784. Its totient is φ = 19956678628320.

The previous prime is 20123203312081. The next prime is 20123203312117. The reversal of 20123203312111 is 11121330232102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123203312111 - 2¹⁵ = 20123203279343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123203312117) 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 7 ways as a sum of consecutive naturals, for example, 164164200 + ... + 164286733.

It is an arithmetic number, because the mean of its divisors is an integer number (2536298112348).

Almost surely, 2^{20123203312111} is an apocalyptic number.

20123203312111 is a deficient number, since it is larger than the sum of its proper divisors (167181586673).

20123203312111 is a wasteful number, since it uses less digits than its factorization.

20123203312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328451441.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20123203312111 its reverse (11121330232102), we get a palindrome (31244533544213).

The spelling of 20123203312111 in words is "twenty trillion, one hundred twenty-three billion, two hundred three million, three hundred twelve thousand, one hundred eleven".