21201002000000 has 112 divisors (see below), whose sum is σ = 52794793163310. Its totient is φ = 8480400000000.

The previous prime is 21201001999999. The next prime is 21201002000027. The reversal of 21201002000000 is 20010212.

It can be written as a sum of positive squares in 7 ways, for example, as 3984942197824 + 17216059802176 = 1996232^2 + 4149224^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3300251 + ... + 7300250.

Almost surely, 2^{21201002000000} is an apocalyptic number.

21201002000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201002000000 is an abundant number, since it is smaller than the sum of its proper divisors (31593791163310).

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

21201002000000 is an frugal number, since it uses more digits than its factorization.

21201002000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600545 (or 10600508 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21201002000000 its reverse (20010212), we get a palindrome (21201022010212).

The spelling of 21201002000000 in words is "twenty-one trillion, two hundred one billion, two million", and thus it is an aban number.