123103213 has 4 divisors (see below), whose sum is σ = 123496828. Its totient is φ = 122709600.

The previous prime is 123103207. The next prime is 123103219. The reversal of 123103213 is 312301321.

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

It is an interprime number because it is at equal distance from previous prime (123103207) and next prime (123103219).

It can be written as a sum of positive squares in 2 ways, for example, as 23941449 + 99161764 = 4893^2 + 9958^2 .

It is a cyclic number.

It is not a de Polignac number, because 123103213 - 2⁹ = 123102701 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 (123103219) 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, 196338 + ... + 196963.

It is an arithmetic number, because the mean of its divisors is an integer number (30874207).

Almost surely, 2^123103213 is an apocalyptic number.

It is an amenable number.

123103213 is a deficient number, since it is larger than the sum of its proper divisors (393615).

123103213 is an equidigital number, since it uses as much as digits as its factorization.

123103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393614.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 123103213 is about 11095.1887320586. The cubic root of 123103213 is about 497.4580495422.

Adding to 123103213 its reverse (312301321), we get a palindrome (435404534).

The spelling of 123103213 in words is "one hundred twenty-three million, one hundred three thousand, two hundred thirteen".