21041004203120 has 240 divisors, whose sum is σ = 54022015182240. Its totient is φ = 7615745280000.

The previous prime is 21041004203111. The next prime is 21041004203179. The reversal of 21041004203120 is 2130240014012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21041004203092 and 21041004203101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3387696815 + ... + 3387703025.

It is an arithmetic number, because the mean of its divisors is an integer number (225091729926).

Almost surely, 2^{21041004203120} is an apocalyptic number.

21041004203120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21041004203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27011007591120).

21041004203120 is an abundant number, since it is smaller than the sum of its proper divisors (32981010979120).

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

21041004203120 is a wasteful number, since it uses less digits than its factorization.

21041004203120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816 (or 7799 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21041004203120 its reverse (2130240014012), we get a palindrome (23171244217132).

The spelling of 21041004203120 in words is "twenty-one trillion, forty-one billion, four million, two hundred three thousand, one hundred twenty".