21029130000 has 300 divisors, whose sum is σ = 76746933120. Its totient is φ = 5363424000.

The previous prime is 21029129983. The next prime is 21029130007. The reversal of 21029130000 is 3192012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (300).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21029130007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2064921 + ... + 2075079.

Almost surely, 2^21029130000 is an apocalyptic number.

21029130000 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 21029130000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38373466560).

21029130000 is an abundant number, since it is smaller than the sum of its proper divisors (55717803120).

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

21029130000 is a wasteful number, since it uses less digits than its factorization.

21029130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216 (or 10192 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The spelling of 21029130000 in words is "twenty-one billion, twenty-nine million, one hundred thirty thousand".