124123213 has 4 divisors (see below), whose sum is σ = 124367580. Its totient is φ = 123878848.

The previous prime is 124123201. The next prime is 124123217. The reversal of 124123213 is 312321421.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87665769 + 36457444 = 9363^2 + 6038^2 .

It is a cyclic number.

It is not a de Polignac number, because 124123213 - 2²⁵ = 90568781 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 (124123217) 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, 121420 + ... + 122437.

It is an arithmetic number, because the mean of its divisors is an integer number (31091895).

Almost surely, 2^124123213 is an apocalyptic number.

It is an amenable number.

124123213 is a deficient number, since it is larger than the sum of its proper divisors (244367).

124123213 is an equidigital number, since it uses as much as digits as its factorization.

124123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244366.

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

The square root of 124123213 is about 11141.0597790336. The cubic root of 124123213 is about 498.8282066125.

Adding to 124123213 its reverse (312321421), we get a palindrome (436444634).

It can be divided in two parts, 12412 and 3213, that added together give a 6-th power (15625 = 5⁶).

The spelling of 124123213 in words is "one hundred twenty-four million, one hundred twenty-three thousand, two hundred thirteen".