124212013204240 has 80 divisors (see below), whose sum is σ = 312069232259568. Its totient is φ = 45706368411648.

The previous prime is 124212013204159. The next prime is 124212013204241. The reversal of 124212013204240 is 42402310212421.

It can be written as a sum of positive squares in 8 ways, for example, as 505299192336 + 123706714011904 = 710844^2 + 11122352^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×124212013204240² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124212013204199 and 124212013204208.

It is not an unprimeable number, because it can be changed into a prime (124212013204241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203508639 + ... + 204118078.

Almost surely, 2^{124212013204240} is an apocalyptic number.

124212013204240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124212013204240 is an abundant number, since it is smaller than the sum of its proper divisors (187857219055328).

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

124212013204240 is a wasteful number, since it uses less digits than its factorization.

124212013204240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407627036 (or 407627030 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 124212013204240 its reverse (42402310212421), we get a palindrome (166614323416661).

The spelling of 124212013204240 in words is "one hundred twenty-four trillion, two hundred twelve billion, thirteen million, two hundred four thousand, two hundred forty".