21050343521144 has 32 divisors (see below), whose sum is σ = 45432396105600. Its totient is φ = 8956672368480.

The previous prime is 21050343521093. The next prime is 21050343521159. The reversal of 21050343521144 is 44112534305012.

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, 1352146862 + ... + 1352162429.

It is an arithmetic number, because the mean of its divisors is an integer number (1419762378300).

Almost surely, 2^{21050343521144} is an apocalyptic number.

It is an amenable number.

21050343521144 is an abundant number, since it is smaller than the sum of its proper divisors (24382052584456).

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

21050343521144 is a wasteful number, since it uses less digits than its factorization.

21050343521144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704309443 (or 2704309439 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21050343521144 its reverse (44112534305012), we get a palindrome (65162877826156).

The spelling of 21050343521144 in words is "twenty-one trillion, fifty billion, three hundred forty-three million, five hundred twenty-one thousand, one hundred forty-four".