124221242136 has 32 divisors (see below), whose sum is σ = 310586572800. Its totient is φ = 41402618400.

The previous prime is 124221242081. The next prime is 124221242137. The reversal of 124221242136 is 631242122421.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124221242137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47640 + ... + 500711.

It is an arithmetic number, because the mean of its divisors is an integer number (9705830400).

Almost surely, 2^124221242136 is an apocalyptic number.

It is an amenable number.

124221242136 is an abundant number, since it is smaller than the sum of its proper divisors (186365330664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124221242136 is a wasteful number, since it uses less digits than its factorization.

124221242136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557799 (or 557795 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

Adding to 124221242136 its reverse (631242122421), we get a palindrome (755463364557).

The spelling of 124221242136 in words is "one hundred twenty-four billion, two hundred twenty-one million, two hundred forty-two thousand, one hundred thirty-six".