311420123 has 4 divisors (see below), whose sum is σ = 355908720. Its totient is φ = 266931528.

The previous prime is 311420119. The next prime is 311420159. The reversal of 311420123 is 321024113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321024113 = 29 ⋅11069797.

It is a cyclic number.

It is not a de Polignac number, because 311420123 - 2² = 311420119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311420173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22244288 + ... + 22244301.

It is an arithmetic number, because the mean of its divisors is an integer number (88977180).

Almost surely, 2^311420123 is an apocalyptic number.

311420123 is a deficient number, since it is larger than the sum of its proper divisors (44488597).

311420123 is an equidigital number, since it uses as much as digits as its factorization.

311420123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44488596.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311420123 is about 17647.0995633843. The cubic root of 311420123 is about 677.8218388020.

Adding to 311420123 its reverse (321024113), we get a palindrome (632444236).

The spelling of 311420123 in words is "three hundred eleven million, four hundred twenty thousand, one hundred twenty-three".