210002002021 has 24 divisors (see below), whose sum is σ = 253047438720. Its totient is φ = 170399319552.

The previous prime is 210002002019. The next prime is 210002002033. The reversal of 210002002021 is 120200200012.

It is not a de Polignac number, because 210002002021 - 2¹ = 210002002019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002001989 and 210002002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002002421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1445535 + ... + 1584163.

It is an arithmetic number, because the mean of its divisors is an integer number (10543643280).

Almost surely, 2^210002002021 is an apocalyptic number.

It is an amenable number.

210002002021 is a deficient number, since it is larger than the sum of its proper divisors (43045436699).

210002002021 is an equidigital number, since it uses as much as digits as its factorization.

210002002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138853 (or 138756 counting only the distinct ones).

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

Adding to 210002002021 its reverse (120200200012), we get a palindrome (330202202033).

The spelling of 210002002021 in words is "two hundred ten billion, two million, two thousand, twenty-one".