212304123 has 24 divisors (see below), whose sum is σ = 317011968. Its totient is φ = 136833072.

The previous prime is 212304107. The next prime is 212304133. The reversal of 212304123 is 321403212.

212304123 is a `hidden beast` number, since 21 + 230 + 412 + 3 = 666.

It is not a de Polignac number, because 212304123 - 2⁴ = 212304107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212304096 and 212304105.

It is not an unprimeable number, because it can be changed into a prime (212304133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32086 + ... + 38132.

It is an arithmetic number, because the mean of its divisors is an integer number (13208832).

Almost surely, 2^212304123 is an apocalyptic number.

212304123 is a deficient number, since it is larger than the sum of its proper divisors (104707845).

212304123 is a wasteful number, since it uses less digits than its factorization.

212304123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183 (or 6180 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212304123 is about 14570.6596624861. The cubic root of 212304123 is about 596.5581859452.

Adding to 212304123 its reverse (321403212), we get a palindrome (533707335).

The spelling of 212304123 in words is "two hundred twelve million, three hundred four thousand, one hundred twenty-three".