210001012221101 has 4 divisors (see below), whose sum is σ = 210001044642204. Its totient is φ = 210000979800000.

The previous prime is 210001012221061. The next prime is 210001012221163. The reversal of 210001012221101 is 101122210100012.

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 33622718220100 + 176378294001001 = 5798510^2 + 13280749^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001012221101 - 2³⁸ = 209726134314157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001012221191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2792300 + ... + 20683301.

It is an arithmetic number, because the mean of its divisors is an integer number (52500261160551).

Almost surely, 2^{210001012221101} is an apocalyptic number.

It is an amenable number.

210001012221101 is a deficient number, since it is larger than the sum of its proper divisors (32421103).

210001012221101 is an equidigital number, since it uses as much as digits as its factorization.

210001012221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32421102.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210001012221101 its reverse (101122210100012), we get a palindrome (311123222321113).

The spelling of 210001012221101 in words is "two hundred ten trillion, one billion, twelve million, two hundred twenty-one thousand, one hundred one".