20121331023023 has 4 divisors (see below), whose sum is σ = 20665150780440. Its totient is φ = 19577511265608.

The previous prime is 20121331022977. The next prime is 20121331023043. The reversal of 20121331023023 is 32032013312102.

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 20121331023023 - 2¹⁰ = 20121331021999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121331023023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121331023043) 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, 271909878653 + ... + 271909878726.

It is an arithmetic number, because the mean of its divisors is an integer number (5166287695110).

Almost surely, 2^{20121331023023} is an apocalyptic number.

20121331023023 is a deficient number, since it is larger than the sum of its proper divisors (543819757417).

20121331023023 is an equidigital number, since it uses as much as digits as its factorization.

20121331023023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543819757416.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20121331023023 its reverse (32032013312102), we get a palindrome (52153344335125).

The spelling of 20121331023023 in words is "twenty trillion, one hundred twenty-one billion, three hundred thirty-one million, twenty-three thousand, twenty-three".