124021340043213 has 4 divisors (see below), whose sum is σ = 165361786724288. Its totient is φ = 82680893362140.

The previous prime is 124021340043199. The next prime is 124021340043247. The reversal of 124021340043213 is 312340043120421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 124021340043213 - 2⁴ = 124021340043197 is a prime.

It is a super-2 number, since 2×124021340043213² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124021340043253) 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, 20670223340533 + ... + 20670223340538.

It is an arithmetic number, because the mean of its divisors is an integer number (41340446681072).

Almost surely, 2^{124021340043213} is an apocalyptic number.

It is an amenable number.

124021340043213 is a deficient number, since it is larger than the sum of its proper divisors (41340446681075).

124021340043213 is an equidigital number, since it uses as much as digits as its factorization.

124021340043213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41340446681074.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 124021340043213 its reverse (312340043120421), we get a palindrome (436361383163634).

The spelling of 124021340043213 in words is "one hundred twenty-four trillion, twenty-one billion, three hundred forty million, forty-three thousand, two hundred thirteen".