20131210310223 has 4 divisors (see below), whose sum is σ = 26841613746968. Its totient is φ = 13420806873480.

The previous prime is 20131210310191. The next prime is 20131210310273. The reversal of 20131210310223 is 32201301213102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20131210310223 - 2⁵ = 20131210310191 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 20131210310223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131210310273) 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 3 ways as a sum of consecutive naturals, for example, 3355201718368 + ... + 3355201718373.

It is an arithmetic number, because the mean of its divisors is an integer number (6710403436742).

Almost surely, 2^{20131210310223} is an apocalyptic number.

20131210310223 is a deficient number, since it is larger than the sum of its proper divisors (6710403436745).

20131210310223 is an equidigital number, since it uses as much as digits as its factorization.

20131210310223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710403436744.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20131210310223 its reverse (32201301213102), we get a palindrome (52332511523325).

The spelling of 20131210310223 in words is "twenty trillion, one hundred thirty-one billion, two hundred ten million, three hundred ten thousand, two hundred twenty-three".