213123124 has 6 divisors (see below), whose sum is σ = 372965474. Its totient is φ = 106561560.

The previous prime is 213123121. The next prime is 213123137. The reversal of 213123124 is 421321312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 182520100 + 30603024 = 13510^2 + 5532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26640387 + ... + 26640394.

Almost surely, 2^213123124 is an apocalyptic number.

It is an amenable number.

213123124 is a deficient number, since it is larger than the sum of its proper divisors (159842350).

213123124 is a wasteful number, since it uses less digits than its factorization.

213123124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53280785 (or 53280783 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 213123124 is about 14598.7370686645. The cubic root of 213123124 is about 597.3243114813.

Adding to 213123124 its reverse (421321312), we get a palindrome (634444436).

The spelling of 213123124 in words is "two hundred thirteen million, one hundred twenty-three thousand, one hundred twenty-four".