21042442034120 has 64 divisors (see below), whose sum is σ = 50989827248640. Its totient is φ = 7769155680000.

The previous prime is 21042442034111. The next prime is 21042442034153. The reversal of 21042442034120 is 2143024424012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10380305 + ... + 12240735.

It is an arithmetic number, because the mean of its divisors is an integer number (796716050760).

Almost surely, 2^{21042442034120} is an apocalyptic number.

21042442034120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21042442034120 is an abundant number, since it is smaller than the sum of its proper divisors (29947385214520).

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

21042442034120 is a wasteful number, since it uses less digits than its factorization.

21042442034120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882206 (or 1882202 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21042442034120 its reverse (2143024424012), we get a palindrome (23185466458132).

The spelling of 21042442034120 in words is "twenty-one trillion, forty-two billion, four hundred forty-two million, thirty-four thousand, one hundred twenty".