21041020000 has 480 divisors, whose sum is σ = 69567531264. Its totient is φ = 6048000000.

The previous prime is 21041019991. The next prime is 21041020009. The reversal of 21041020000 is 2014012.

It is an interprime number because it is at equal distance from previous prime (21041019991) and next prime (21041020009).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041020009) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20019475 + ... + 20020525.

Almost surely, 2^21041020000 is an apocalyptic number.

21041020000 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 21041020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34783765632).

21041020000 is an abundant number, since it is smaller than the sum of its proper divisors (48526511264).

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

21041020000 is a wasteful number, since it uses less digits than its factorization.

21041020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21041020000 its reverse (2014012), we get a palindrome (21043034012).

The spelling of 21041020000 in words is "twenty-one billion, forty-one million, twenty thousand".