21201200002 has 8 divisors (see below), whose sum is σ = 31813634700. Its totient is φ = 10596655104.

The previous prime is 21201199963. The next prime is 21201200003. The reversal of 21201200002 is 20000210212.

It can be written as a sum of positive squares in 2 ways, for example, as 19284599161 + 1916600841 = 138869^2 + 43779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21201200003) 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 3 ways as a sum of consecutive naturals, for example, 1965727 + ... + 1976482.

Almost surely, 2^21201200002 is an apocalyptic number.

21201200002 is a deficient number, since it is larger than the sum of its proper divisors (10612434698).

21201200002 is a wasteful number, since it uses less digits than its factorization.

21201200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944900.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21201200002 its reverse (20000210212), we get a palindrome (41201410214).

The spelling of 21201200002 in words is "twenty-one billion, two hundred one million, two hundred thousand, two".