124431122440 has 128 divisors (see below), whose sum is σ = 292372869600. Its totient is φ = 47602114560.

The previous prime is 124431122429. The next prime is 124431122461. The reversal of 124431122440 is 44221134421.

It can be written as a sum of positive squares in 16 ways, for example, as 22426260516 + 102004861924 = 149754^2 + 319382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 124431122399 and 124431122408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72300780 + ... + 72302500.

Almost surely, 2^124431122440 is an apocalyptic number.

124431122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124431122440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146186434800).

124431122440 is an abundant number, since it is smaller than the sum of its proper divisors (167941747160).

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

124431122440 is a wasteful number, since it uses less digits than its factorization.

124431122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315 (or 2311 counting only the distinct ones).

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

Adding to 124431122440 its reverse (44221134421), we get a palindrome (168652256861).

The spelling of 124431122440 in words is "one hundred twenty-four billion, four hundred thirty-one million, one hundred twenty-two thousand, four hundred forty".