21412420111240 has 32 divisors (see below), whose sum is σ = 48249109189080. Its totient is φ = 8552316677632.

The previous prime is 21412420111219. The next prime is 21412420111297. The reversal of 21412420111240 is 4211102421412.

It can be written as a sum of positive squares in 4 ways, for example, as 21412405041316 + 15069924 = 4627354^2 + 3882^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395327797 + ... + 395381956.

Almost surely, 2^{21412420111240} is an apocalyptic number.

21412420111240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412420111240 is an abundant number, since it is smaller than the sum of its proper divisors (26836689077840).

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

21412420111240 is a wasteful number, since it uses less digits than its factorization.

21412420111240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790710441 (or 790710437 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 21412420111240 its reverse (4211102421412), we get a palindrome (25623522532652).

The spelling of 21412420111240 in words is "twenty-one trillion, four hundred twelve billion, four hundred twenty million, one hundred eleven thousand, two hundred forty".