21020310020000 has 120 divisors (see below), whose sum is σ = 51878348767476. Its totient is φ = 8381258496000.

The previous prime is 21020310019927. The next prime is 21020310020027. The reversal of 21020310020000 is 2001302012.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 5080317649936 + 15939992370064 = 2253956^2 + 3992492^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4581062 + ... + 7938938.

Almost surely, 2^{21020310020000} is an apocalyptic number.

21020310020000 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 21020310020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25939174383738).

21020310020000 is an abundant number, since it is smaller than the sum of its proper divisors (30858038747476).

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

21020310020000 is an equidigital number, since it uses as much as digits as its factorization.

21020310020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358220 (or 3358197 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21020310020000 its reverse (2001302012), we get a palindrome (21022311322012).

The spelling of 21020310020000 in words is "twenty-one trillion, twenty billion, three hundred ten million, twenty thousand".