210322130021 has 4 divisors (see below), whose sum is σ = 211240567500. Its totient is φ = 209403692544.

The previous prime is 210322129943. The next prime is 210322130063. The reversal of 210322130021 is 120031223012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149120317921 + 61201812100 = 386161^2 + 247390^2 .

It is a cyclic number.

It is not a de Polignac number, because 210322130021 - 2¹⁴ = 210322113637 is a prime.

It is a super-3 number, since 3×210322130021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210322030021) 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, 459218396 + ... + 459218853.

It is an arithmetic number, because the mean of its divisors is an integer number (52810141875).

Almost surely, 2^210322130021 is an apocalyptic number.

It is an amenable number.

210322130021 is a deficient number, since it is larger than the sum of its proper divisors (918437479).

210322130021 is an equidigital number, since it uses as much as digits as its factorization.

210322130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918437478.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210322130021 its reverse (120031223012), we get a palindrome (330353353033).

The spelling of 210322130021 in words is "two hundred ten billion, three hundred twenty-two million, one hundred thirty thousand, twenty-one".