210002111021 has 4 divisors (see below), whose sum is σ = 210013612992. Its totient is φ = 209990609052.

The previous prime is 210002111003. The next prime is 210002111027. The reversal of 210002111021 is 120111200012.

210002111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210002111021 - 2¹⁸ = 210001848877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002110993 and 210002111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002111027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5723555 + ... + 5760128.

It is an arithmetic number, because the mean of its divisors is an integer number (52503403248).

Almost surely, 2^210002111021 is an apocalyptic number.

It is an amenable number.

210002111021 is a deficient number, since it is larger than the sum of its proper divisors (11501971).

210002111021 is a wasteful number, since it uses less digits than its factorization.

210002111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11501970.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210002111021 its reverse (120111200012), we get a palindrome (330113311033).

The spelling of 210002111021 in words is "two hundred ten billion, two million, one hundred eleven thousand, twenty-one".