2131312212223 has 4 divisors (see below), whose sum is σ = 2131590859200. Its totient is φ = 2131033565248.

The previous prime is 2131312212199. The next prime is 2131312212277. The reversal of 2131312212223 is 3222122131312.

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 2131312212223 - 2⁵ = 2131312212191 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 (2131312218223) 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, 139312015 + ... + 139327312.

It is an arithmetic number, because the mean of its divisors is an integer number (532897714800).

Almost surely, 2^{2131312212223} is an apocalyptic number.

2131312212223 is a deficient number, since it is larger than the sum of its proper divisors (278646977).

2131312212223 is an equidigital number, since it uses as much as digits as its factorization.

2131312212223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278646976.

The product of its digits is 1728, while the sum is 25.

Adding to 2131312212223 its reverse (3222122131312), we get a palindrome (5353434343535).

The spelling of 2131312212223 in words is "two trillion, one hundred thirty-one billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty-three".