124021213 has 2 divisors, whose sum is σ = 124021214. Its totient is φ = 124021212.

The previous prime is 124021211. The next prime is 124021241. The reversal of 124021213 is 312120421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116057529 + 7963684 = 10773^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 124021213 - 2¹ = 124021211 is a prime.

It is a super-2 number, since 2×124021213² = 30762522547982738, which contains 22 as substring.

Together with 124021211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62010606 + 62010607.

It is an arithmetic number, because the mean of its divisors is an integer number (62010607).

Almost surely, 2^124021213 is an apocalyptic number.

It is an amenable number.

124021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

124021213 is an equidigital number, since it uses as much as digits as its factorization.

124021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 124021213 is about 11136.4811767452. The cubic root of 124021213 is about 498.6915294633.

Adding to 124021213 its reverse (312120421), we get a palindrome (436141634).

The spelling of 124021213 in words is "one hundred twenty-four million, twenty-one thousand, two hundred thirteen".