21000030100002 has 48 divisors (see below), whose sum is σ = 45813735807840. Its totient is φ = 6951876604416.

The previous prime is 21000030099973. The next prime is 21000030100013. The reversal of 21000030100002 is 20000103000012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3109752 + ... + 7188227.

It is an arithmetic number, because the mean of its divisors is an integer number (954452829330).

Almost surely, 2^{21000030100002} is an apocalyptic number.

21000030100002 is an abundant number, since it is smaller than the sum of its proper divisors (24813705707838).

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

21000030100002 is a wasteful number, since it uses less digits than its factorization.

21000030100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298767 (or 10298764 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 21000030100002 its reverse (20000103000012), we get a palindrome (41000133100014).

The spelling of 21000030100002 in words is "twenty-one trillion, thirty million, one hundred thousand, two".