213103123 has 4 divisors (see below), whose sum is σ = 217637280. Its totient is φ = 208568968.

The previous prime is 213103097. The next prime is 213103127. The reversal of 213103123 is 321301312.

213103123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-213103123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213103097 and 213103106.

It is not an unprimeable number, because it can be changed into a prime (213103127) 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, 2267008 + ... + 2267101.

It is an arithmetic number, because the mean of its divisors is an integer number (54409320).

Almost surely, 2^213103123 is an apocalyptic number.

213103123 is a deficient number, since it is larger than the sum of its proper divisors (4534157).

213103123 is an equidigital number, since it uses as much as digits as its factorization.

213103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534156.

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

The square root of 213103123 is about 14598.0520275823. The cubic root of 213103123 is about 597.3056251666.

Adding to 213103123 its reverse (321301312), we get a palindrome (534404435).

The spelling of 213103123 in words is "two hundred thirteen million, one hundred three thousand, one hundred twenty-three".