4121251205440 has 56 divisors (see below), whose sum is σ = 9816706706400. Its totient is φ = 1648000363008.

The previous prime is 4121251205417. The next prime is 4121251205443. The reversal of 4121251205440 is 445021521214.

It is a super-2 number, since 2×4121251205440² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121251205443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896262 + ... + 3007621.

Almost surely, 2^{4121251205440} is an apocalyptic number.

4121251205440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4121251205440 is an abundant number, since it is smaller than the sum of its proper divisors (5695455500960).

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

4121251205440 is a wasteful number, since it uses less digits than its factorization.

4121251205440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907199 (or 3907189 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 4121251205440 its reverse (445021521214), we get a palindrome (4566272726654).

The spelling of 4121251205440 in words is "four trillion, one hundred twenty-one billion, two hundred fifty-one million, two hundred five thousand, four hundred forty".