124202020009 has 4 divisors (see below), whose sum is σ = 131508021204. Its totient is φ = 116896018816.

The previous prime is 124202019971. The next prime is 124202020093. The reversal of 124202020009 is 900020202421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900020202421 = 269 ⋅3345800009.

It can be written as a sum of positive squares in 2 ways, for example, as 85649875600 + 38552144409 = 292660^2 + 196347^2 .

It is a cyclic number.

It is not a de Polignac number, because 124202020009 - 2⁹ = 124202019497 is a prime.

It is a super-3 number, since 3×124202020009³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124202020409) 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, 3653000572 + ... + 3653000605.

It is an arithmetic number, because the mean of its divisors is an integer number (32877005301).

Almost surely, 2^124202020009 is an apocalyptic number.

It is an amenable number.

124202020009 is a deficient number, since it is larger than the sum of its proper divisors (7306001195).

124202020009 is an equidigital number, since it uses as much as digits as its factorization.

124202020009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306001194.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 124202020009 in words is "one hundred twenty-four billion, two hundred two million, twenty thousand, nine".