21021010200002 has 4 divisors (see below), whose sum is σ = 31531515300006. Its totient is φ = 10510505100000.

The previous prime is 21021010199993. The next prime is 21021010200053. The reversal of 21021010200002 is 20000201012012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19851560449081 + 1169449750921 = 4455509^2 + 1081411^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255252549999 + ... + 5255252550002.

Almost surely, 2^{21021010200002} is an apocalyptic number.

21021010200002 is a deficient number, since it is larger than the sum of its proper divisors (10510505100004).

21021010200002 is a wasteful number, since it uses less digits than its factorization.

21021010200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510505100003.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21021010200002 its reverse (20000201012012), we get a palindrome (41021211212014).

The spelling of 21021010200002 in words is "twenty-one trillion, twenty-one billion, ten million, two hundred thousand, two".