21130042234240 has 64 divisors (see below), whose sum is σ = 50520580110000. Its totient is φ = 8450917115904.

The previous prime is 21130042234219. The next prime is 21130042234271. The reversal of 21130042234240 is 4243224003112.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×21130042234240² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21130042234199 and 21130042234208.

It is a congruent number.

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, 2783206 + ... + 7071514.

Almost surely, 2^{21130042234240} is an apocalyptic number.

21130042234240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130042234240 is an abundant number, since it is smaller than the sum of its proper divisors (29390537875760).

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

21130042234240 is an equidigital number, since it uses as much as digits as its factorization.

21130042234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296027 (or 4296015 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21130042234240 its reverse (4243224003112), we get a palindrome (25373266237352).

The spelling of 21130042234240 in words is "twenty-one trillion, one hundred thirty billion, forty-two million, two hundred thirty-four thousand, two hundred forty".