210020021100002 has 4 divisors (see below), whose sum is σ = 315030031650006. Its totient is φ = 105010010550000.

The previous prime is 210020021099989. The next prime is 210020021100011. The reversal of 210020021100002 is 200001120020012.

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., 206217095988121 + 3802925111881 = 14360261^2 + 1950109^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52505005274999 + ... + 52505005275002.

Almost surely, 2^{210020021100002} is an apocalyptic number.

210020021100002 is a deficient number, since it is larger than the sum of its proper divisors (105010010550004).

210020021100002 is a wasteful number, since it uses less digits than its factorization.

210020021100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105010010550003.

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

Adding to 210020021100002 its reverse (200001120020012), we get a palindrome (410021141120014).

The spelling of 210020021100002 in words is "two hundred ten trillion, twenty billion, twenty-one million, one hundred thousand, two".