3121323123 has 32 divisors (see below), whose sum is σ = 4431361536. Its totient is φ = 1950144768.

The previous prime is 3121323109. The next prime is 3121323137. The reversal of 3121323123 is 3213231213.

It is an interprime number because it is at equal distance from previous prime (3121323109) and next prime (3121323137).

It is not a de Polignac number, because 3121323123 - 2¹⁷ = 3121192051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3121323123.

It is not an unprimeable number, because it can be changed into a prime (3121323193) 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 31 ways as a sum of consecutive naturals, for example, 788836 + ... + 792782.

It is an arithmetic number, because the mean of its divisors is an integer number (138480048).

Almost surely, 2^3121323123 is an apocalyptic number.

3121323123 is a deficient number, since it is larger than the sum of its proper divisors (1310038413).

3121323123 is a wasteful number, since it uses less digits than its factorization.

3121323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203.

The product of its digits is 648, while the sum is 21.

The square root of 3121323123 is about 55868.8027704192. The cubic root of 3121323123 is about 1461.4352438813.

Adding to 3121323123 its reverse (3213231213), we get a palindrome (6334554336).

The spelling of 3121323123 in words is "three billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-three".