210002210130021 has 4 divisors (see below), whose sum is σ = 280002946840032. Its totient is φ = 140001473420012.

The previous prime is 210002210130019. The next prime is 210002210130059. The reversal of 210002210130021 is 120031012200012.

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 210002210130021 - 2¹ = 210002210130019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002210130071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35000368355001 + ... + 35000368355006.

It is an arithmetic number, because the mean of its divisors is an integer number (70000736710008).

Almost surely, 2^{210002210130021} is an apocalyptic number.

It is an amenable number.

210002210130021 is a deficient number, since it is larger than the sum of its proper divisors (70000736710011).

210002210130021 is an equidigital number, since it uses as much as digits as its factorization.

210002210130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70000736710010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 210002210130021 its reverse (120031012200012), we get a palindrome (330033222330033).

The spelling of 210002210130021 in words is "two hundred ten trillion, two billion, two hundred ten million, one hundred thirty thousand, twenty-one".