21203002201 has 2 divisors, whose sum is σ = 21203002202. Its totient is φ = 21203002200.

The previous prime is 21203002199. The next prime is 21203002217. The reversal of 21203002201 is 10220030212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20635609801 + 567392400 = 143651^2 + 23820^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203002201 - 2¹ = 21203002199 is a prime.

It is a super-2 number, since 2×21203002201² (a number of 21 digits) contains 22 as substring.

Together with 21203002199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21203002231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601501100 + 10601501101.

It is an arithmetic number, because the mean of its divisors is an integer number (10601501101).

Almost surely, 2^21203002201 is an apocalyptic number.

It is an amenable number.

21203002201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203002201 is an equidigital number, since it uses as much as digits as its factorization.

21203002201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21203002201 its reverse (10220030212), we get a palindrome (31423032413).

The spelling of 21203002201 in words is "twenty-one billion, two hundred three million, two thousand, two hundred one".