312021321103123 has 4 divisors (see below), whose sum is σ = 312021960140968. Its totient is φ = 312020682065280.

The previous prime is 312021321103117. The next prime is 312021321103127. The reversal of 312021321103123 is 321301123120213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312021321103123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312021321103127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318785961 + ... + 319763242.

It is an arithmetic number, because the mean of its divisors is an integer number (78005490035242).

Almost surely, 2^{312021321103123} is an apocalyptic number.

312021321103123 is a deficient number, since it is larger than the sum of its proper divisors (639037845).

312021321103123 is an equidigital number, since it uses as much as digits as its factorization.

312021321103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639037844.

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

Adding to 312021321103123 its reverse (321301123120213), we get a palindrome (633322444223336).

The spelling of 312021321103123 in words is "three hundred twelve trillion, twenty-one billion, three hundred twenty-one million, one hundred three thousand, one hundred twenty-three".