124020353521 has 8 divisors (see below), whose sum is σ = 131330717280. Its totient is φ = 116711661888.

The previous prime is 124020353473. The next prime is 124020353537. The reversal of 124020353521 is 125353020421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 124020353521 - 2³¹ = 121872869873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124020353521.

It is not an unprimeable number, because it can be changed into a prime (124020353221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263691 + ... + 563536.

It is an arithmetic number, because the mean of its divisors is an integer number (16416339660).

Almost surely, 2^124020353521 is an apocalyptic number.

It is an amenable number.

124020353521 is a deficient number, since it is larger than the sum of its proper divisors (7310363759).

124020353521 is an equidigital number, since it uses as much as digits as its factorization.

124020353521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836063.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 124020353521 its reverse (125353020421), we get a palindrome (249373373942).

The spelling of 124020353521 in words is "one hundred twenty-four billion, twenty million, three hundred fifty-three thousand, five hundred twenty-one".