21210220200002 has 8 divisors (see below), whose sum is σ = 31815351900300. Its totient is φ = 10605102899904.

The previous prime is 21210220199977. The next prime is 21210220200047. The reversal of 21210220200002 is 20000202201212.

It can be written as a sum of positive squares in 2 ways, for example, as 13536372830761 + 7673847369241 = 3679181^2 + 2770171^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21210220200002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563374 + ... + 6698102.

Almost surely, 2^{21210220200002} is an apocalyptic number.

21210220200002 is a deficient number, since it is larger than the sum of its proper divisors (10605131700298).

21210220200002 is a wasteful number, since it uses less digits than its factorization.

21210220200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200100.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21210220200002 its reverse (20000202201212), we get a palindrome (41210422401214).

The spelling of 21210220200002 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, two hundred thousand, two".