311212031320123 has 4 divisors (see below), whose sum is σ = 311596718627880. Its totient is φ = 310827344012368.

The previous prime is 311212031320121. The next prime is 311212031320139. The reversal of 311212031320123 is 321023130212113.

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 311212031320123 - 2¹ = 311212031320121 is a prime.

It is a super-3 number, since 3×311212031320123³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212031320121) 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, 192343652665 + ... + 192343654282.

It is an arithmetic number, because the mean of its divisors is an integer number (77899179656970).

Almost surely, 2^{311212031320123} is an apocalyptic number.

311212031320123 is a deficient number, since it is larger than the sum of its proper divisors (384687307757).

311212031320123 is an equidigital number, since it uses as much as digits as its factorization.

311212031320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384687307756.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 311212031320123 its reverse (321023130212113), we get a palindrome (632235161532236).

The spelling of 311212031320123 in words is "three hundred eleven trillion, two hundred twelve billion, thirty-one million, three hundred twenty thousand, one hundred twenty-three".