210220002021 has 4 divisors (see below), whose sum is σ = 280293336032. Its totient is φ = 140146668012.

The previous prime is 210220001963. The next prime is 210220002037. The reversal of 210220002021 is 120200022012.

210220002021 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 de Polignac number, because none of the positive numbers 2^k-210220002021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210220001988 and 210220002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220002061) 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, 35036667001 + ... + 35036667006.

It is an arithmetic number, because the mean of its divisors is an integer number (70073334008).

Almost surely, 2^210220002021 is an apocalyptic number.

It is an amenable number.

210220002021 is a deficient number, since it is larger than the sum of its proper divisors (70073334011).

210220002021 is an equidigital number, since it uses as much as digits as its factorization.

210220002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70073334010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 210220002021 its reverse (120200022012), we get a palindrome (330420024033).

The spelling of 210220002021 in words is "two hundred ten billion, two hundred twenty million, two thousand, twenty-one".