124120420040 has 32 divisors (see below), whose sum is σ = 279303336000. Its totient is φ = 49642409664.

The previous prime is 124120420031. The next prime is 124120420049. The reversal of 124120420040 is 40024021421.

It is an interprime number because it is at equal distance from previous prime (124120420031) and next prime (124120420049).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 124120419994 and 124120420021.

It is not an unprimeable number, because it can be changed into a prime (124120420049) 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, 178031 + ... + 529089.

It is an arithmetic number, because the mean of its divisors is an integer number (8728229250).

Almost surely, 2^124120420040 is an apocalyptic number.

124120420040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124120420040 is an abundant number, since it is smaller than the sum of its proper divisors (155182915960).

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

124120420040 is a wasteful number, since it uses less digits than its factorization.

124120420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359909 (or 359905 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 124120420040 its reverse (40024021421), we get a palindrome (164144441461).

The spelling of 124120420040 in words is "one hundred twenty-four billion, one hundred twenty million, four hundred twenty thousand, forty".