21044151130420 has 48 divisors (see below), whose sum is σ = 48245660479296. Its totient is φ = 7646795840000.

The previous prime is 21044151130397. The next prime is 21044151130427. The reversal of 21044151130420 is 2403115144012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044151130427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34842106 + ... + 35440945.

It is an arithmetic number, because the mean of its divisors is an integer number (1005117926652).

Almost surely, 2^{21044151130420} is an apocalyptic number.

21044151130420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044151130420 is an abundant number, since it is smaller than the sum of its proper divisors (27201509348876).

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

21044151130420 is a wasteful number, since it uses less digits than its factorization.

21044151130420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70284432 (or 70284430 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 21044151130420 its reverse (2403115144012), we get a palindrome (23447266274432).

The spelling of 21044151130420 in words is "twenty-one trillion, forty-four billion, one hundred fifty-one million, one hundred thirty thousand, four hundred twenty".