21103331201 has 2 divisors, whose sum is σ = 21103331202. Its totient is φ = 21103331200.

The previous prime is 21103331143. The next prime is 21103331213. The reversal of 21103331201 is 10213330112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12962961025 + 8140370176 = 113855^2 + 90224^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103331201 - 2¹⁰ = 21103330177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21103331201.

It is not a weakly prime, because it can be changed into another prime (21103331281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551665600 + 10551665601.

It is an arithmetic number, because the mean of its divisors is an integer number (10551665601).

Almost surely, 2^21103331201 is an apocalyptic number.

It is an amenable number.

21103331201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103331201 is an equidigital number, since it uses as much as digits as its factorization.

21103331201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21103331201 its reverse (10213330112), we get a palindrome (31316661313).

The spelling of 21103331201 in words is "twenty-one billion, one hundred three million, three hundred thirty-one thousand, two hundred one".