21213100303201 has 4 divisors (see below), whose sum is σ = 21451449744900. Its totient is φ = 20974750861504.

The previous prime is 21213100303193. The next prime is 21213100303223. The reversal of 21213100303201 is 10230300131212.

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 7099373736225 + 14113726566976 = 2664465^2 + 3756824^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213100303201 - 2³ = 21213100303193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213100303231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119174720716 + ... + 119174720893.

It is an arithmetic number, because the mean of its divisors is an integer number (5362862436225).

Almost surely, 2^{21213100303201} is an apocalyptic number.

It is an amenable number.

21213100303201 is a deficient number, since it is larger than the sum of its proper divisors (238349441699).

21213100303201 is an equidigital number, since it uses as much as digits as its factorization.

21213100303201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238349441698.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21213100303201 its reverse (10230300131212), we get a palindrome (31443400434413).

The spelling of 21213100303201 in words is "twenty-one trillion, two hundred thirteen billion, one hundred million, three hundred three thousand, two hundred one".