210001000020000 has 480 divisors, whose sum is σ = 787322316211200. Its totient is φ = 47995926144000.

The previous prime is 210001000019969. The next prime is 210001000020017. The reversal of 210001000020000 is 20000100012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8794368061 + ... + 8794391939.

It is an arithmetic number, because the mean of its divisors is an integer number (1640254825440).

Almost surely, 2^{210001000020000} is an apocalyptic number.

210001000020000 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 210001000020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393661158105600).

210001000020000 is an abundant number, since it is smaller than the sum of its proper divisors (577321316191200).

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

210001000020000 is a wasteful number, since it uses less digits than its factorization.

210001000020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44858 (or 44835 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 210001000020000 its reverse (20000100012), we get a palindrome (210021000120012).

The spelling of 210001000020000 in words is "two hundred ten trillion, one billion, twenty thousand".