210100010202221 has 4 divisors (see below), whose sum is σ = 210100062072444. Its totient is φ = 210099958332000.

The previous prime is 210100010202169. The next prime is 210100010202259. The reversal of 210100010202221 is 122202010001012.

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 191786103926596 + 18313906275625 = 13848686^2 + 4279475^2 .

It is a cyclic number.

It is not a de Polignac number, because 210100010202221 - 2⁶ = 210100010202157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100010202196 and 210100010202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100010204221) 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, 19292210 + ... + 28149411.

It is an arithmetic number, because the mean of its divisors is an integer number (52525015518111).

Almost surely, 2^{210100010202221} is an apocalyptic number.

It is an amenable number.

210100010202221 is a deficient number, since it is larger than the sum of its proper divisors (51870223).

210100010202221 is an equidigital number, since it uses as much as digits as its factorization.

210100010202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51870222.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210100010202221 its reverse (122202010001012), we get a palindrome (332302020203233).

The spelling of 210100010202221 in words is "two hundred ten trillion, one hundred billion, ten million, two hundred two thousand, two hundred twenty-one".