21115230000 has 200 divisors, whose sum is σ = 68341261296. Its totient is φ = 5616000000.

The previous prime is 21115229957. The next prime is 21115230013. The reversal of 21115230000 is 3251112.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16229350 + ... + 16230650.

Almost surely, 2^21115230000 is an apocalyptic number.

21115230000 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 21115230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34170630648).

21115230000 is an abundant number, since it is smaller than the sum of its proper divisors (47226031296).

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

21115230000 is a wasteful number, since it uses less digits than its factorization.

21115230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21115230000 its reverse (3251112), we get a palindrome (21118481112).

The spelling of 21115230000 in words is "twenty-one billion, one hundred fifteen million, two hundred thirty thousand".